Discordant pairs | Concordant pairs with high physical workload | Probandwise concordance rate (95% CI) | Tetrachoric correlation (95% CI) | ||
Men | MZ | 172 | 226 | 0.72 (0.69 to 0.76) | 0.72 (0.65 to 0.80) |
Same-sex DZ | 165 | 151 | 0.65 (0.60 to 0.69) | 0.53 (0.42 to 0.64) | |
Women | MZ | 283 | 269 | 0.66 (0.62 to 0.69) | 0.65 (0.59 to 0.82) |
Same-sex DZ | 291 | 182 | 0.56 (0.52 to 0.59) | 0.40 (0.30 to 0.50) | |
Men and women | Opposite-sex DZ | 505 | 294 | 0.54 (0.51 to 0.57) | 0.31 (0.23 to 0.39) |
Stratified by sex, and zygosity (monozygotic (MZ), same-sex dizygotic (DZ), opposite-sex DZ).