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Table 2 Coding framework

From: The effectiveness of graphic health warnings on tobacco products: a systematic review on perceived harm and quit intentions

Construct Code(s)
A. Bibliographic Information
 Authors(s) As stated in article
 Title As stated in article
 Publication year As stated in article
B. Study Characteristics
 Study design 1. Randomized Controlled Trial (RCT) or Controlled Clinical Trial (CCT)
2. Quasi Experiment (two or more groups pre and post)
3. Cohort (one group pre and post)
4. Interrupted time series (or Longitudinal)
 Location Country, Region
 Study aim(s) As stated in article
 Product cigarette, e-cigar, shisha, beedis, roll your own, etc.
 GHWs disclosure formats - Graphics Location
i. Both the front and back
ii. On principal display areas (top, bottom)
iii. Package inserts
iv. Others
v. 51% or more
vi. Between 31% ~ 50%
vii. Less than 30%
viii. Black and white
ix. Others (specify)
Image concept
x. Positive outcome focused
xi. Negative outcome focused
Others – Congruency – whether the image is congruent with the text warnings
 GHWs disclosure formats - Texts Location
xii. All sides of a package
xiii. Both the front and back
xiv. On principal display areas (top, bottom)
xv. Package inserts
xvi. Others
xvii. Legible font size
xviii. Not legible font size
xix. Black and white
xx. Others (specify)
Message content
xxi. Positive outcome focused
xxii. Negative outcome focused
Source attribution (specify)
Others (specify)
 Intervention sample Sample description (e.g. people aged 18–25, smokers)
C. Outcome Evaluation
 Outcome measure - Benefits of quitting/Quit intentions Pre-post changes across different groups
 Outcome measure - Perceived risk of smoking Pre-post changes across different groups