Screening and vaccination as determined by the Social Ecological Model and the Theory of Triadic Influence: a systematic review

Table 4 Summary results of the data extraction form for quality assessment

Indicator	Categorization	Articles using SEM		Articles using TTI
		Frequency	Percent^a	Frequency	Percent^a
1. Clarity of CRQ(s)/hypothesis	0. Missing	10	25.0	6	13.0
	1. Unclear	19	47.5	18	39.1
	2. Clear	11	27.5	22	47.8
2. Clarity of data collection methods	0. Missing	10	25.0	5	10.9
	1. Unclear	3	7.5	1	2.2
	2. Clear	27	67.5	40	87.0
3. Clarity of sampling plan	0. Missing	17	42.5	17	37.0
	1.Unclear	4	10.0	2	4.3
	2. Clear	19	47.5	27	58.7
4. Clarity of sampling size	0. Missing	13	32.5	7	15.2
	1. Unclear	3	7.5	8	17.4
	2. Clear	24	60.0	31	67.4
5. Clarity of analysis method	0. Missing	17	42.5	8	17.4
5. Clarity of analysis method	1. Present	23	57.5	38	82.6
6. Clarity of conclusions	0. Missing	-	0.0	-	0.0
6. Clarity of conclusions	1. Present	40	100.0	46	100.0
7. Clarity of limitations	0. Missing	16	40.0	8	17.4
	1. Unclear	6	15.0	2	4.3
	2. Clear	18	45.0	36	78.3

^aThe percentage is calculated over the total number of accepted studies, which are 40 for the SEM and 46 for the TTI

ISSN: 1471-2458