TABLE 2—
Variable | Studies, No. (%) |
Gender of parent participantsa | |
Mothers only | 244 (36) |
Fathers only | 8 (1) |
Mothers and fathers | 340 (51) |
Results disaggregated for fathers (% of all studies) | 57 (9) |
Not specified | 75 (11) |
Sample sizes for mothersb | |
1–10 | 8 (1) |
11–50 | 113 (21) |
51–200 | 150 (29) |
201–500 | 115 (22) |
501–1000 | 68 (13) |
1001–5000 | 55 (10) |
≥ 5001 | 15 (3) |
Sample sizes for fathersc | |
1–10 | 87 (29) |
11–50 | 91 (30) |
51–200 | 72 (24) |
201–500 | 22 (7) |
501–1000 | 10 (3) |
1001–5000 | 18 (6) |
≥ 5001 | 4 (1) |
Denominator for % of studies = all eligible studies (n = 667).
Denominator for % of studies = studies that included mothers and the number of mothers is known (n = 524).
Denominator for % of studies = studies that included fathers and the number of fathers is known (n = 304).