Table 2 Characteristics of participants by zygosity

Age (years), mean (SD)

70.8 (5.5)

71.0 (5.7)

70.7 (5.2)

0.662

Sex, n (% female)

251 (67.1)

140 (67.3)

111 (66.9)

0.916

BMI (kg/m²), mean (SD)^a

27.5 (4.4)

27.0 (4.3)

28.1 (4.3)

0.014

Education (years), mean (SD)^a

11.5 (3.3)

11.2 (3.3)

11.8 (3.4)

0.107

Activities of daily living score, mean (SD)^b

1.35 (0.47)

1.34 (0.46)

1.35 (0.48)

0.941

Living arrangement^b

 - In the community alone, n (%)

99 (26.4)

52 (25.0)

47 (28.3)

 - In the community with spouse, n (%)

231 (61.8)

128 (61.5)

103 (62.1)

0.483

 - In the community with other, n (%)

34 (9.1)

23 (11.1)

11 (6.6)

 - Other, n (%)

10 (2.7)

5 (2.4)

5 (3.0)

Energy intake, (kJ/day), mean (SD)

7121 (2683)

6881 (2661)

7422 (2689)

0.053

Fruit intake (serves/day), mean (SD)

2.13 (1.35)

2.15 (1.33)

2.12 (1.40)

0.819

Vegetable intake (serves/day), mean (SD)

2.53 (1.11)

2.52 (1.14)

2.56 (1.08)

0.739

Geriatric depression scale score, mean (SD)

1.74 (2.04)

1.66 (1.96)

1.84 (2.14)

0.415