Table 4 Intraclass correlations and heritability estimates for fruit and vegetable intakes and depressive symptoms by sex
|  | ICC MZ (95% CI) n = 104 pairs | ICC DZ (95% CI) n = 83 pairs | Heritability (95% CI) | Heritability p-value | Unique Environmental Influence (95% CI) |
|---|---|---|---|---|---|
Female | |||||
 - Fruit intake | 0.28 (0.13, 0.41) | 0.14 (0.06, 0.20) | 0.28 (0.13, 0.41) | 0.012 | 0.72 (0.59, 0.87) |
 - Vegetable intake | 0.55 (0.43, 0.65) | 0.27 (0.22, 0.33) | 0.55 (0.43, 0.65) |  < 0.001 | 0.45 (0.35, 0.57) |
 - Depressive symptoms | 0.30 (0.16, 0.42) | 0.15 (0.08, 0.21) | 0.30 (0.16, 0.42) | 0.001 | 0.70 (0.58, 0.84) |
Male | |||||
 - Fruit intake | 0.04 (0.00, 0.22) | 0.02 (0.00, 0.11) | 0.04 (0.00, 0.22) | 0.588 | 0.96 (0.78, 1.00) |
 - Vegetable intake | 0.23 (0.02, 0.45) | 0.11 (0.01, 0.23) | 0.23 (0.02, 0.45) | 0.146 | 0.77 (0.55, 0.98) |
 - Depressive symptoms | 0.28 (0.06, 0.59) | 0.14 (0.03, 0.30) | 0.28 (0.06, 0.59) | 0.050 | 0.72 (0.41, 0.94) |