Table 2.
Means (SD) of Age, Anxiety symptoms & health related quality of life (QoL) measures
| MZM | DZM | MZF | DZF | DZOS | Singleton males | Singleton females | |
|---|---|---|---|---|---|---|---|
| Age | 37.53 (12.49) | 39.41 (13.02) | 39.21 (12.83) | 43.09 (14.07) | 40.28 (13.19) | 52.48 (15.45) | 50.84 (14.32) |
| Anxiety | 1.53 (2.75) | 1.29 (2.62) | 1.90 (3.06) | 2.01 (3.78) | 1.83 (3.30) | 1.85 (3.48) | 2.36 (3.75) |
| General health | 63.26 (14.97) | 62.83 (14.39) | 61.45 (16.35) | 60.28 (16.94) | 61.01 (15.88) | 60.94 (15.04) | 57.14 (17.71) |
| Physical functioning | 93.82 (14.90) | 93.95 (13.36) | 88.53 (19.25) | 88.05 (19.24) | 91.39 (17.06) | 87.12 (22.62) | 82.94 (21.53) |
| Role of physical problems | 86.11 (31.72) | 88.67 (29.47) | 81.97 (35.3) | 79.24 (37.01) | 82.21 (35.43) | 79.86 (38.02) | 78.21 (39.24) |
| Emotional wellbeing | 78.85 (15.70) | 80.5 (14.00) | 77.36 (15.58) | 76.83 (16.78) | 78.57 (15.94) | 80.44 (14.15) | 76.25 (17.42) |
| Role of emotional problems | 88.7 (28.88) | 91.53 (25.10) | 85.24 (31.9) | 85.91 (31.89) | 87.39 (30.65) | 88.17 (30.31) | 84.56 (34.44) |
| Energy/fatigue | 74.3 (17.15) | 75.3 (14.97) | 74.56 (16.49) | 73.80 (17.07) | 74.21 (16.83) | 71.16 (16.83) | 69.63 (17.68) |
| Pain | 88.7 (19.57) | 90.3 (16.99) | 85.46 (20.78) | 83.56 (21.29) | 86.34 (19.52) | 87.64 (20.46) | 86.50 (21.10) |
| Social functioning | 89.93 (17.81) | 91.31 (17.76) | 88.5 (19.05) | 88.31 (20.86) | 89.65 (18.56) | 89.22 (21.47) | 89.00 (20.48) |
The range of the anxiety scale = 0–21; The range of the total SF-36 sub-scales = 1–100
MZM monozygotic male twins, MZF monozygotic female twins, DZM dizygotic male twins, DZF dizygotic female twins, DZOS dizygotic opposite sex twins