Table 1.
Overall characteristics of (a) publications included and (b) birth cohorts identified in the systematic review.
| (a) Publications (n = 57) | (b) Birth cohorts (n = 39) | |
|---|---|---|
| Region (N, %) | ||
| Europe | 32 (56.1) | 27 (69.2) |
| Oceania | 17 (29.8) | 8 (20.5) |
| North America | 7 (12.3) | 3 (7.7) |
| Asia | 1 (1.8) | 1 (2.6) |
| Year of publication (N, %) | ||
| ≤2007 | 26 (45.6) | Not applicable |
| 2008–2010 STROBEa | 11 (19.3) | Not applicable |
| ≥2011 STROBEa | 20 (35.1) | Not applicable |
| Participants' age at follow-up (N, %) | ||
| ≤2 years | 17 (29.8) | Not applicable |
| 3–5 years | 13 (22.8) | Not applicable |
| >5 years | 27 (47.4) | Not applicable |
| Completeness (N, %) | ||
| “Scarce information” | 5 (8.8) | Not applicable |
| “Some information” | 31 (54.4) | Not applicable |
| “Enough information” | 21 (36.8) | |
| Recruitment start year (median, p25–p75) | Not applicable | 1994 (1985–2001) |
| Baseline sample size (median, p25–p75) | Not applicable | 397 (250–707) |
| Recruitment setting (N, %) | ||
| Single center | 17 (29.8) | 13 (33.3) |
| Multicenter | 40 (70.2) | 26 (66.7) |
STROBE, Strengthening the Reporting of Observational Studies in Epidemiology.
a
After STROBE Statement.