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Tetrachoric correlation
| rMZ (95% CI) | rDZ (95% CI) | p-value* | |
|---|---|---|---|
| Women | 0.66 (0.54–0.75) | 0.36 (0.25–0.46) | < 0.01 |
| Men | 0.56 (0.45–0.65) | 0.35 (0.25–0.45) | 0.08 |
rMZ = correlation coefficient for monozygotic twins, rDZ = correlation coefficient for dizygotic twins.
Test for equal threshold for MZ and DZ.
