Random-effects meta-analysis pooled sex ratios for indicators of problematic alcohol use within 5-year birth cohorts
| Birth cohort | Number of individual sex ratio estimates | Number of citations* | Number of countries | Random-effects pooled sex ratio (95% CI) |
|---|---|---|---|---|
| 1891–1910 | 12 | 6 | 6 | 3.0 (1.5 to 6.0) |
| 1911–1915 | 12 | 6 | 9 | 2.7 (1.3 to 5.8) |
| 1916–1920 | 18 | 8 | 9 | 2.8 (1.6 to 5.1) |
| 1921–1925 | 19 | 7 | 12 | 2.2 (1.4 to 3.3) |
| 1926–1930 | 21 | 9 | 12 | 2.2 (1.5 to 3.3) |
| 1931–1935 | 22 | 9 | 14 | 2.3 (1.6 to 3.3) |
| 1936–1940 | 31 | 15 | 15 | 2.3 (1.8 to 2.9) |
| 1941–1945 | 31 | 14 | 16 | 2.3 (1.7 to 3.0) |
| 1946–1950 | 35 | 16 | 18 | 2.0 (1.6 to 2.5) |
| 1951–1955 | 33 | 15 | 18 | 2.2 (1.8 to 2.8) |
| 1956–1960 | 34 | 16 | 18 | 2.0 (1.7 to 2.4) |
| 1961–1965 | 27 | 13 | 17 | 2.1 (1.6 to 2.8) |
| 1966–1970 | 28 | 15 | 18 | 2.0 (1.5 to 2.5) |
| 1971–1975 | 27 | 15 | 20 | 2.0 (1.5 to 2.7) |
| 1976–1980 | 28 | 15 | 21 | 1.9 (1.5 to 2.3) |
| 1981–1985 | 27 | 14 | 35 | 1.6 (1.3 to 2.0) |
| 1986–1990 | 13 | 6 | 30 | 1.2 (0.9 to 1.5) |
| 1991–2000 | 4 | 3 | 27 | 1.2 (1.1 to 1.4) |
*Represents the number of citations from which the individual estimates were extracted. Some citations reported results from separate repeated cross-sectional surveys, or separate surveys conducted in a number of different countries.