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Table 2 Results of assessment of methodological quality of eligible experimental and quasi-experimental studies

From: Effectiveness of primary school-based interventions in improving oral health of children in low- and middle-income countries: a systematic review and meta-analysis

S/N Study Quality assessment domains
1 2 3 4 5 6 7 8 9 10 11 12a 12b 12c 12d 13
1 Chachra et al. [45] 3 3 2 3 2 3 1 3 3 1 3 3 3 2 1 2
2 Chauhan et al. [30] 3 3 1 1 2 1 1 2 2 1 1 1 1 1 1 2
3 Chounchaisithi et al. [22] 3 1 1 2 2 1 1 2 2 1 1 1 3 1 1 2
4 De Farias et al. [29] 3 3 1 3 2 3 1 1 2 1 1 1 3 1 1 2
5 Duijster et al. [23] 2 3 1 3 2 1 1 1 2 1 1 1 1 1 1 1
6 Esan et al. [28] 1 1 3 3 2 3 2 3 3 1 3 1 3 1 1 2
7 Frencken et al. [51] 3 3 1 3 2 2 2 1 2 1 1 1 3 1 1 2
8 Gholami et al. [35] 3 3 1 3 3 3 1 1 1 1 3 1 3 1 1 2
9 Haleem et al. [49] 1 1 2 1 2 1 1 1 2 1 1 1 1 1 1 1
10 Hartono et al. [31] 3 3 2 3 2 2 1 1 1 1 3 1 3 1 1 2
11 Hebbal et al. [41] 1 3 1 3 2 1 1 3 3 1 1 1 3 1 1 2
12 Hebbal and Nagarajappa [37] 1 3 1 3 2 3 1 3 2 1 3 1 3 2 1 2
13 Jaime et al. [32] 2 2 2 3 2 3 1 1 2 1 3 1 3 1 1 2
14 Kapadia et al. [33] 2 3 1 3 3 1 1 3 3 1 3 1 3 1 1 2
15 Naidu and Nandlal [34] 3 3 1 3 2 2 1 2 2 1 1 1 3 1 1 2
16 Nammontri et al. [42] 1 1 1 3 2 3 1 1 2 1 1 1 3 1 1 1
17 Nyandindi et al. [46] 3 3 3 3 2 1 1 1 1 1 1 1 3 1 1 2
18 Pakhomov et al. [52] 2 2 1 3 2 1 1 2 2 1 1 1 3 1 1 2
19 Peng et al. [27] 3 3 2 3 2 3 1 1 2 1 1 1 3 1 1 2
20 Petersen et al. [8] 3 3 1 3 2 3 1 1 2 1 1 1 3 1 1 2
21 Saied-Moallemi et al. [43] 3 3 2 1 2 1 1 1 2 1 1 1 1 1 1 1
22 Simpriano and Mialhe [44] 3 3 1 3 2 3 1 1 2 1 3 1 1 1 1 2
23 Swe et al. [40 3 3 2 3 3 3 1 1 1 1 3 1 3 1 1 2
24 Tai et al. [9] 1 1 1 3 2 1 1 1 2 1 1 1 1 1 1 1
25 Tomazoni et al. [47] 1 1 2 3 2 3 1 1 2 1 1 1 1 1 1 1
26 Uckardes et al. [26] 3 3 1 1 1 1 1 1 2 1 3 1 3 3 1 2
27 Van Palenstein et al. [50] 3 3 1 3 2 1 1 1 2 1 1 1 3 1 1 2
28 Van Wyk et al. [25] 1 3 1 3 2 3 1 2 2 1 3 1 3 1 1 1
29 Yekaninejad et al. [48] 3 3 1 3 2 3 1 1 1 1 1 1 1 1 1 1
30 Zacharias et al. [53] 3 1 2 1 2 2 1 1 2 1 3 1 1 1 1 1
  1. Key: 1 Yes; 2 No; 3 Unclear
  2. Domain 1: Was true randomization used for assignment of participants to treatment groups?
  3. Domain 2: Was allocation to treatment groups concealed?
  4. Domain 3: Were treatment groups similar at the baseline?
  5. Domain 4: Were participants blind to treatment assignment?
  6. Domain 5: Were those delivering treatment blind to treatment assignment?
  7. Domain 6: Were outcomes assessors blind to treatment assignment?
  8. Domain 7: Were treatments groups treated identically other than the intervention of interest?
  9. Domain 8: Was follow up complete and if not, were differences between groups in terms of their follow up adequately described and analysed?
  10. Domain 9: Were participants analysed in the groups to which they were randomized?
  11. Domain 10: Were outcomes measured in the same way for treatment groups?
  12. Domain 11: Were outcomes measured in a reliable way?
  13. Domain 12a: Was appropriate statistical analysis used? Checked if the assumptions of statistical tests were respected
  14. Domain 12b: Was appropriate statistical analysis used? Checked if appropriate statistical power analysis was performed
  15. Domain 12c: Was appropriate statistical analysis used? Checked if appropriate effect sizes were used;
  16. Domain 12 d: Was appropriate statistical analysis used? Checked if appropriate statistical procedures or methods were used given the number and type of dependent and independent variables, the number of study groups, the nature of the relationship between the groups (independent or dependent groups), and the objectives of the statistical analysis (association between variables; prediction; survival analysis)
  17. Domain 13: Was the trial design appropriate for the topic, and any deviations from the standard RCT design (individual randomization, parallel groups) accounted for in the conduct and analysis of the trial?