- Research article
- Open Access
Informing tobacco control policy in Jordan: assessing the effectiveness of pictorial warning labels on cigarette packs
BMC Public Health volume 18, Article number: 84 (2018)
- The Erratum to this article has been published in BMC Public Health 2017 17:736
Pictorial warning labels (PWLs) deter initiation and motivate quitting. Assessing PWLs is important to track effectiveness and wear out. Jordan introduced an updated set of PWLs in 2013. This study assessed the effectiveness of the set after 2.5 years on the market.
We administered a survey in a cross-sectional sample of young adults aged 17–26 years. For convenience, respondents were recruited on university campuses. For heterogeneity, respondents were solicited from the different schools in four geographically diverse university campuses. The study compared perceptions of effectiveness surveyed in 2015 to perceptions gauged in 2010 during a pre-launch evaluation exercise. Outcomes of interest were: salience, fear evocation, adding information, and ability to motivate quitting smoking (for smokers) or deterring starting (for non-smokers).
Results indicate awareness of the set among smokers and non-smokers, and their recall of at least one PWL message. Results also indicate effectiveness of the set: (1) 1/3 smokers who frequently saw them reported PWLs to trigger considering quitting, (2) and among both smokers and non-smokers the set in 2015 sustained ability to motivate quitting and staying smoke-free. However, results uncover erosion of salience, suggesting that the set has reached its end of life. Finally, results reveal variability in performance among PWLs; the one PWL that depicts human suffering significantly outperformed the others, and its ability to motivate was most strongly associated with its ability to evoke fear.
Based on the early signs of wear-out (i.e. erosion of salience), and understanding the importance of sustaining upstream outcomes (especially fear evocation) to sustain motivation, we recommend retiring this set of PWLs and replacing it with a stronger set in line with proven standards.
Tobacco use is linked to numerous diseases and is globally considered the leading cause of preventable death . Recognizing this principle, the Framework Convention on Tobacco Control (FCTC) sets forth evidence-based strategies that, when implemented, help countries address the tobacco epidemic . One of the most cost-effective demand-reduction strategies of the FCTC is introducing health warnings to the packaging of tobacco products with the purpose of communicating health risks and reducing tobacco use [2, 3].
Article 11 of the FCTC provides guidelines for effective warnings, including measures that enhance their prominence [2, 3]. Effective warnings should be large, clear, visible, and legible, and should utilize a set of rotating messages. Preferably, they should occupy the top part of the principal display areas (front and back of the packaging) and occupy 50% or more of those areas.
For enhanced effectiveness, Article 11 recommends the use of pictures or pictograms to form pictorial warning labels (PWLs), preferably through utilizing graphic or shocking images [2, 3]. Strong PWLs have been shown to dissuade from experimentation, deter initiation, motivate quitting or decreased consumption, and support those who quit in staying abstinent [2,3,4,5,6,7,8]. These effects give PWLs additional importance in low- and middle-income countries (LMICs) where mass media campaigns are lacking, thus rendering PWLs one of the few sources of information on the effects of smoking [9, 10].
Article 11 of the FCTC further details measures for sustained benefit, including conducting periodic reviews and assessments to address wear out and dilution of impact [3, 9, 11, 12]. While wear out could occur as early as one year after launching, [9, 12] stronger warnings tend to sustain their impact for longer periods of time .
Compared to countries of the Eastern Mediterranean Region (EMR) and other parts of the world, Jordan is heavily burdened with tobacco use. Prevalence among adult males exceeds 70%,  and 34% of boys (ages 13–15) currently use some form of tobacco products . In line with the requirements of the FCTC to which it has been a party since 2004,  Jordan enforced one PWL in 2006 (covering 30% of the packet area) . Regrettably, no structured pre-launch testing or post-launch assessment of this PWL was conducted .
Aiming to strengthen compliance with FCTC requirements, Jordan followed that single PWL with a replacement set of PWLs which was launched in early 2013 and continues to be in circulation today [17, 19]. The new set includes four rotating PWLs covering 40% of the lower back area of the packet (where 2/3 of the space is occupied by a picture and 1/3 by text, and a thick border is included within the space), along with a fixed text warning covering 40% of the lower front area (to view the set of PWLs visit http://global.tobaccofreekids.org/files/pdfs/en/WL_country_Jordan_en.pdf). While this set increased the area covered and the number of PWLs in circulation, it did not introduce other changes deemed critical to strengthen effectiveness; [2, 3, 20] namely moving the PWL to the upper front surface of the packet and increasing its size to 50% of the packet area. Accordingly, despite being one of the first countries to implement PWLs,  Jordan today does not score well on fulfilling FCTC requirements with regards to Article 11, and lags behind other countries in the region and the world including late adopters [19, 21,22,23].
This study sought to assess the effectiveness of the new set of PWLs after having them circulate on the market for 2.5 years. To do so, the study compared perceptions of the set in 2015 to the immediate perceptions of the same set as gauged in 2010 during a pre-launch evaluation exercise . Building on this comparison, the study generated recommendations for strengthening the effectiveness of PWLs in Jordan and their compliance with the guidelines set by the FCTC.
In line with the design used in the pre-launch evaluation,  a cross-sectional sample of young adults (ages 17–26) was targeted for this long-term assessment. For convenience, respondents were recruited on university campuses. Out of 1250 survey copies delivered to the surveyors at the initiation of the data collection phase, a total of 1101 completed surveys were returned. After conducting data checks and data cleaning, responses from a final sample of 920 respondents were considered reliable for data analysis.
An adaptation of the instrument that was utilized during the pre-launch evaluation was used for this study . The Arabic instrument consisted of four sections. The first section collected demographic information (sex, age, and education). The second section gauged the respondents’ opinions on the harms of smoking and on the need for PWLs. The third section assessed the respondents’ notice and recall of the PWLs in circulation and their general reactions to these PWLs. Finally, the fourth section gauged the respondents’ perceptions of each of the four PWLs in circulation through four identical subsections.
Each of the subsections of the fourth section addressed one of the PWLs in circulation. Upon prompting the respondent with an image of the pertinent PWL as a recall aid, each subsection started with a prequalifying question (Have you previously seen this warning?) which served as a filter based on which the respondent was requested to provide feedback. Those responding positively to this question, were requested to rate the PWL on four outcomes: salience, fear evocation, adding information, and ability to motivate quitting smoking (for smokers) or deterring starting (for non-smokers) [5, 7, 24]. A five-point Likert scale was used for all ratings, ranging from ‘1’ to ‘5’ or from ‘strongly disagree’ to ‘strongly agree’.
The survey instrument was reviewed and approved by the Institutional Review Board at King Hussein Cancer Center. An English translation is available electronically as Additional file 1.
In May 2015, 25 volunteers were recruited through Jordan’s chapter of the International Federation of Medical Students Association to serve as surveyors (volunteers received no remuneration but were compensated for transportation costs). Prior to embarking on data collection, the volunteers were introduced to the purpose and the design of the study; trained on the survey tool and interviewing methods; and trained on how to identify potential respondents in common areas, how to approach them to introduce the study and confirm that they fall within the targeted age group, and how to obtain verbal consent from those willing to participate prior to administering the survey.
Recruitment of respondents followed certain guidelines. To ensure geographic diversity, the volunteers came from four university campuses (Jordan University of Science and Technology in the northern region, University of Jordan and Hashemite University in the central region, and Mutah University in the southern region). To ensure diversity in the educational background of the respondents, each surveyor recruited respondents from the various schools on his/her own university campus. Surveyors approached potential respondents, explained the purpose and procedure for the study, highlighted that participation was voluntary and that the respondents could withdraw at any time, and highlighted that no identifying information would be collected. Once a respondent provided verbal consent, a surveyor spent up to 30 min interviewing the respondent and documenting responses in the survey tool. Respondents received no compensation.
Measures and data analysis
Data analysis was conducted using SAS version 9.4 (SAS Institute Inc., Cary, NC). Responses against the five-point scale were dichotomized. Ratings of ‘4’ and ‘5’ were grouped and reported as positive while ratings of ‘1’, ‘2’, and ‘3’ were grouped as neutral or negative. Similarly, ratings of ‘agree’ and ‘strongly agree’ were grouped as positive while ratings of ‘neutral’, ‘disagree’, and ‘strongly disagree’ were grouped as neutral or negative. For the purpose of this article, all reporting was separated into two groups: smokers and non-smokers (those reporting to be regular or occasional smokers were considered smokers, while those reporting to be non-smokers or former smokers were collectively considered non-smokers).
Within each group, we calculated the percentages of respondents agreeing with opinion statements (Section B in the survey instrument), and the percentages of respondents reporting notice and recall of PWLs (as gauged through the first item of each of Sections D-G in the survey instrument). For each PWL and across all four outcomes of interest (salience, fear evocation, adding information, and ability to motivate quitting/staying smokefree), we calculated the percentages of respondents with positive perceptions, and compared those to the percentages obtained in 2010 in an attempt to quantify the sustained gain in perceptions. Testing for the significance of the gain was conducted using logistic regression with a significance criterion of p ≤ 0.05. Finally, we calculated the odds ratio for the association between the downstream outcomes of motivation and the perceptions on upstream outcomes (salience, fear evocation, and adding information) using logistic regression.
Specifically among smokers, we looked at the frequency of noticing PWLs (item C5) and associated that with considering quitting (item C8). We also looked at the recall of PWL content (item C3) and associated that with avoidance (item C7). Finally, we looked at the general intentions to quit (item C10) and associated that with the ability of each of the PWLs to motivate quitting (items 5 and 6 of sections D-G). Associations were carried out using Chi-square test.
The mean age for the sample was 20.3 years (SD = 1.6) and males (57.0%, 524/920) slightly outnumbered females (43.0%, 396/920). Of the 920 respondents considered for data analysis, 33.6% (309) were smokers while 66.4% (611) were non-smokers.
Table 1 details the proportion of smokers and non-smokers agreeing with certain statements on the harms of smoking and the need for warnings. It also details the proportion of those noticing PWLs in circulation and recalling their message content.
Specifically among smokers, 63.1% (195/309) reported seeing PWLs frequently (every time or some of the times they held a cigarette packet). Of those, 36.4% (71/195, p < 0.05) reported being influenced by the PWLs enough to consider quitting and 31.8% (62/195) reported avoiding looking at them. Among smokers recalling at least one of the statements associated with PWLs on cigarette packs, 32.2% (66/205, p < 0.05) reported avoiding looking at them.
Among smokers who reported a general intention to quit within 6 months of survey administration (169), a significant majority (66.9%, 113/169, p < 0.0001) also reported PWL4 to motivate quitting. Proportions for other PWLs were lower: 18.9% for PWL1 (32/169, p < 0.001); 37.9% for PWL2 (64/169, p < 0.05); and 38.5% for PWL3 (65/169, p < 0.05).
For each of the four PWLs being evaluated, and across all four outcomes of interest, Fig. 1 presents the gain sustained in 2015. For example, compared to 24.8% of smokers agreeing with the ability of PWL4 to motivate them to quit in 2010, a total of 58.2% of smokers agreed in 2015, resulting in a significant sustained gain of 134.7% ((58.2%–24.8%)/24.8%). Figure 1 also presents the gain sustained by the set of PWLs as depicted by Average for set, which was calculated for all outcomes of interest using the average for all four PWLs in 2015 and comparing that to the average in 2010.
For insight into the association between the gain on motivation and the gain on other upstream outcomes, Table 2 takes a closer look at PWL4 which sustained a significant positive gain in 2015 across all outcomes in both smokers and non-smokers. For example, the odds ratio for gaining on motivation given a gain on salience was 3.2 for smokers and 2.0 for non-smokers.
This paper presents the methodology for and results of the first long-term assessment of PWLs in Jordan and the EMR. To the best of our knowledge, there are no similar assessments from the EMR and only a few from LMICs, thus our findings could potentially inform decisions in other countries. Moreover, and in the absence of systematic cohort studies like the International Tobacco Control Policy Evaluation Project,  we believe that our methodology could provide a model for other countries to use to assess the effectiveness of PWLs.
After circulating for 2.5 years on the Jordanian market, our results (Table 1) indicate public awareness of the set of PWLs. About ¾ of smokers and ½ of non-smokers reported having seen one or more of the PWLs in circulation, and considerable proportions of both smokers (66.3%) and non-smokers (42.1%) were capable of recalling at least one of the messages associated with the PWLs.
Specifically among smokers who are aware of the PWLs, our results indicate an overall effectiveness of the set. Among those reporting frequently seeing the PWLs, 1/3 reported the PWLs to have influenced them to the extent they considered quitting. Among those reporting recalling the messages of the PWLs, 1/3 reported avoiding looking at PWLs; a quality which has been shown to be an indication of effectiveness [7, 26,27,28].
Overall effectiveness of the set among smokers as well as non-smokers can also be seen through examining results on the outcomes of motivation, fear evocation, and adding information (as depicted by Average for set in Fig. 1). With repeated exposure, the set seems to have achieved and consequently sustained some gain on its ability to motivate smokers to quit and non-smokers to stay smoke-free. Looking further upstream indicates that the set has also achieved and sustained a gain on the cognitive and emotional reactions of evoking fear and adding information.
Despite these sustained gains, the results on salience suggest that the set may have reached its end of life. Evidence concludes that the effectiveness of PWLs peaks shortly after implementation, and that salience is the first dimension to suffer erosion thereafter [5, 11, 29]. In line with this evidence, our results point in the direction of imminent wear-out of the set: the salience among smokers has dropped below the initial values obtained in 2010 (which is expected with habituation since 63.1% of smokers reported seeing them frequently), and among non-smokers the set seems to sustain only marginal salience beyond that of 2010.
At the level of individual PWLs, our results suggest variability in performance (as shown by sustained gains for individual PWLs in Fig. 1). PWL4 outperformed all others by being the only one to sustain a significant positive gain in 2015 on all outcomes including salience; a proven sign of the strength for PWLs . Accordingly, our data suggest PWL4 to be stronger than others, especially when all four PWLs started at comparable levels of impact in 2010. A closer look at PWL4 (Table 2) indicates that the gain on motivation among both smokers and non-smokers (which was significantly greater than that for other PWLs) was associated with the gain on all three upstream outcomes, with fear evocation displaying the strongest association. This is in line with the evidence on the association between negative emotional reactions and intentions to quit [5, 28].
While not strictly graphic, PWL4 may have outperformed others by being along the lines of depicting disease and human suffering, a characteristic capable of eliciting emotional arousal (such as fear) which is a key driver of motivation [5, 29]. Accordingly, and since 1 in 4 smokers reports disagreement with smoking being harmful to smokers (Table 1), future PWLs should include diversified content that targets individuals at various stages of the change process . This is specifically valuable since more smokers report getting information about the risks of smoking from PWLs compared to other sources .
Our study has its limitations. First, it focused on a sample of young educated adults and did not extend the assessment to other socio-economic groups. However, previous studies suggest that in line with research on mass media interventions, PWLs perform comparably among various subgroups . Second, the study relied on cross-sectional sampling at both time points rather that employing a cohort study design. However, the sampling mechanism attempted to harmonize the study population to the extent possible.
Based on the early signs of wear-out (i.e. erosion of salience), and based on understanding the importance of sustaining a gain on upstream outcomes (especially fear evocation) to sustain motivation, we recommend starting the process of retiring this set of PWLs and replacing it with a stronger one. Our recommendation is to stay in line with proven standards. For enhanced salience, the new set should have the PWLs on the front side of the packet (or on both sides),  and enlarge them to cover at least 50% of the surface area while minimizing the area occupied by text within the PWL [3, 5, 24]. For enhanced engagement, arousal, and effectiveness, the set should utilize gruesome images that depict disease and avoid symbolic abstract imagery [5, 29]. Based on emerging evidence, we also recommend considering ‘innovative policy configurations’ that could delay wear out such as combining PWLs with inserts or with plain packaging .
Although not specifically addressed within this study, the revision should tackle an important weakness of health warning policy in Jordan: the lack of any information on quitting. While motivation is critical for the actual quitting behavior, it is not enough; a smoker needs a sense of self-efficacy to trigger a quit attempt [7, 11, 20]. Accordingly, revised tobacco control policies in Jordan should consider providing smokers with information on the available tobacco dependence treatment services and on behavioral recommendations and coping skills to support unaided quitting. While such information could be included in PWLs, there is evidence of the association between reading pack inserts that carry efficacy messages and sustained quit attempts . Thus, for enhanced effectiveness, we recommend considering of the use of package inserts to supplement the content of PWLs.
Our recommendation comes at a critical time when the high prevalence of smoking in Jordan is still on the rise. Only strict implementation of MPOWER strategies (six demand-specific policies the World Health Organization recommends to counter the tobacco epidemic)  is capable of reversing further growth in prevalence. Independent of other strategies, strong PWLs are forecasted to achieve a 3.0% drop in prevalence in the first five years (as estimated by the SimSmoke model, presentation at the Regional Meeting to Achieve the NCD Tobacco Target held by World Health Organization – EMR Office on June 8, 2015 in Tunisia).
Eastern Mediterranean Region
Framework Convention on Tobacco Control
Low- and Middle-Income Countries
Pictorial warning labels
World Health Organization. WHO report on the global tobacco epidemic 2013. Tobacco Free Initiative (TFI). http://www.who.int/tobacco/global_report/2013/en/. Published 2013. Accessed 20 Mar 2017.
WHO Framework Convention on Tobacco Control. 2003. http://www.who.int/fctc/text_download/en/. Accessed 20 Mar 2017.
Guidelines for implementation of Article 11. Guidelines on packaging and labelling of tobacco products. WHO. 2008. http://www.who.int/fctc/guidelines/adopted/article_11/en/. Accessed 20 Mar 2017.
Azagba S, Sharaf MF. The effect of graphic cigarette warning labels on smoking behavior: evidence from the Canadian experience. Nicotine Tob Res. 2013;15(3):708–17.
Hammond D. Health warning messages on tobacco products: a review. Tob Control. 2011;20(5):327–37.
Hammond D, Wakefield M, Durkin S, Brennan E. Tobacco packaging and mass media campaigns: research needs for articles 11 and 12 of the WHO framework convention on tobacco control. Nicotine Tob Res. 2013;15(4):817–31.
Noar SM, Hall MG, Francis DB, Ribisl KM, Pepper JK, Brewer NT. Pictorial cigarette pack warnings: a meta-analysis of experimental studies. Tob Control. 2016;25(3):341–54.
Villanti AC, Cantrell J, Pearson JL, Vallone DM, Rath JM. Perceptions and perceived impact of graphic cigarette health warning labels on smoking behavior among U.S. young adults. Nicotine Tob Res. 2014;16(4):469–77.
Green AC, Kaai SC, Fong GT, Driezen P, Quah AC, Burhoo P. Investigating the effectiveness of pictorial health warnings in Mauritius: findings from the ITC Mauritius survey. Nicotine Tob Res. 2014;16(9):1240–7.
Monarrez-Espino J, Liu B, Greiner F, Bremberg S, Galanti R. Systematic review of the effect of pictorial warnings on cigarette packages in smoking behavior. Am J Public Health. 2014;104(10):e11–30.
Hammond D, Fong GT, Borland R, Cummings KM, McNeill A, Driezen P. Text and graphic warnings on cigarette packages: findings from the international tobacco control four country study. Am J Prev Med. 2007;32(3):202–9.
Hammond D, Thrasher J, Reid JL, Driezen P, Boudreau C, Santillan EA. Perceived effectiveness of pictorial health warnings among Mexican youth and adults: a population-level intervention with potential to reduce tobacco-related inequities. Cancer Causes Control. 2012;23(Suppl 1):57–67.
Borland R, Wilson N, Fong GT, Hammond D, Cummings KM, Yong HH, Hosking W, Hastings G, Thrasher J, McNeill A. Impact of graphic and text warnings on cigarette packs: findings from four countries over five years. Tob Control. 2009;18(5):358–64.
World Health Organization. Global Health Observatory (GHO). Prevalence of Tobacco Smoking. http://gamapserver.who.int/gho/interactive_charts/tobacco/use/atlas.html. Published 2016. Accessed 20 Mar 2017.
World Health Organization. Global Youth Tobacco Survey Country Fact Sheets-Jordan 2009. http://www.emro.who.int/images/stories/tfi/documents/GYTS_FS_JOR_2009.pdf?ua=1. Published 2012. Accessed 20 Mar 2017.
United Nations. United Nations Treaty Collection. https://treaties.un.org/pages/ViewDetails.aspx?src=TREATY&mtdsg_no=IX-4&chapter=9&clang=_en. Published 2003. Accessed 20 Mar 2017.
Campaign for Tobacco-Free Kids .Pictorial Health Warning Labels by Country/Jurisdiction by WHO Region. http://global.tobaccofreekids.org/files/pdfs/en/WL_country_Jordan_en.pdf. Published 2015. Accessed 20 March 2017.
Hawari FI, Bader RK, Beano HM, Obeidat NA, Ayub HS, Habashneh MA, Shtaiwi AS, Shihab RA, Madanat HN, Novotny TE. Perceptions of young Jordanian adults to proposed anti-tobacco pictorial warning labels. BMC Public Health. 2011;11:414.
Canadian Cancer Society, Cigarette package health warnings: international status report, Fifth Edition, October 2016.
Noar SM, Francis DB, Bridges C, Sontag JM, Ribisl KM, Brewer NT. The impact of strengthening cigarette pack warnings: systematic review of longitudinal observational studies. Soc Sci Med. 2016;164:118–29.
World Health Organization. WHO report on the global tobacco epidemic 2015. Tobacco Free Initiative (TFI). http://www.who.int/tobacco/global_report/2015/en/. Published 2015. Accessed 20 Mar 2017.
World Health Organization. Global Health Observatory (GHO). Warn About the Dangers of Tobacco, 2014. http://gamapserver.who.int/mapLibrary/Files/Maps/WarnDangersTobacco_2014.png. Published 2015. Accessed 20 Mar 2017. .
World Health Organization. Global Health Observatory (GHO). Tobacco Control Policies and Interventions, 2014. http://gamapserver.who.int/gho/interactive_charts/tobacco/policies/atlas.html?indicator=i3&filter=filter4,Eastern%20Mediterranean. Published 2015. Accessed 20 Mar 2017.
Gravely S, Fong GT, Driezen P, McNally M, Thrasher JF, Thompson ME, Boado M, Bianco E, Borland R, Hammond D. The impact of the 2009/2010 enhancement of cigarette health warning labels in Uruguay: longitudinal findings from the international tobacco control (ITC) Uruguay survey. Tob Control. 2016;25(1):89–95.
International Tobacco Control (ITC) Policy Evaluation Project. What is the ITC Project? http://www.itcproject.org/node/1. Published 2014. Updated 2016. Accessed 20 Mar 2017.
Borland R, Yong HH, Wilson N, Fong GT, Hammond D, Cummings KM, Hosking W, McNeill A. How reactions to cigarette packet health warnings influence quitting: findings from the ITC four-country survey. Addiction. 2009;104(4):669–75.
Cho YJ, Thrasher JF, Swayampakala K, Yong HH, McKeever R, Hammond D, Anshari D, Cummings KM, Borland R. Does reactance against cigarette warning labels matter? Warning label responses and downstream smoking cessation amongst adult smokers in Australia, Canada, Mexico and the United States. PLoS One. 2016;11(7):e0159245.
Yong HH, Borland R, Thrasher JF, Thompson ME, Nagelhout GE, Fong GT, Hammond D, Cummings KM. Mediational pathways of the impact of cigarette warning labels on quit attempts. Health Psychol. 2014;33(11):1410–20.
Thrasher JF, Villalobos V, Szklo A, Fong GT, Perez C, Sebrie E, Sansone N, Figueiredo V, Boado M, Arillo-Santillan E, et al. Assessing the impact of cigarette package health warning labels: a cross-country comparison in Brazil, Uruguay and Mexico. Salud publica de Mexico. 2010;52(Suppl 2):S206–15.
Mead EL, Cohen JE, Kennedy CE, Gallo J, Latkin CA. The role of theory-driven graphic warning labels in motivation to quit: a qualitative study on perceptions from low-income, urban smokers. BMC Public Health. 2015;15:92.
Swayampakala K, Thrasher JF, Yong HH, Nagelhout GE, Li L, Borland R, Hammond D, O'Connor RJ, Hardin JW. Over-time impacts of Pictoprial health warning Lables and their differences across smoker subgroups: Rsults from adult smokers in Canada and Australia. Nicotine Tob Res. 2017; [Epub ahead of print]
Thrasher JF, Swayampakala K, Cummings KM, Hammond D, Anshari D, Grugman DM, Hardin JW. Cigarette package inserts can promote efficacy beliefs and sustained smoking cessation attempts: a longitudinal assessment of an innovative policy in Canada. Prev Med. 2016;88:59–65.
World Health Organization. Tobacco Free Initiative (TFI). http://www.who.int/tobacco/mpower/en/. Updated 2017. Accessed 20 Mar 2017.
The authors acknowledge the diligent work of the surveyors from the International Federation of Medical Students’ Associations - Jordan Chapter, who volunteered their time to administer the survey. We would also like to thank Dr. Rima Afifi from the American University of Beirut for her support in providing us with the survey instrument.
Research reported in this publication was funded through a grant received from the World Health Organization – Jordan Country Office.
Availability of data and materials
The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.
Ethics approval and consent to participate
The survey instrument and methods (including that for informed consent) were reviewed and approved by the Institutional Review Board (IRB) at King Hussein Cancer Center. Since no identifying information were being collected and the IRB classified the project as imposing no more than minimal risk, only verbal consent was obtained from respondents.
Consent for publication
The authors declare that they have no competing interests.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
An erratum to this article is available at https://doi.org/10.1186/s12889-017-4709-6.
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Bader, R.K., Shihab, R.A., Al-Rimawi, D.H. et al. Informing tobacco control policy in Jordan: assessing the effectiveness of pictorial warning labels on cigarette packs. BMC Public Health 18, 84 (2018). https://doi.org/10.1186/s12889-017-4642-8
- Pictorial warning labels
- Assessment of effectiveness
- Tobacco control policy