Table 1 Baseline demographic and socio-economic characteristics

Number of members

238,180

121,700

Male (%)^a

158,589 (66.57 %)

73,815 (60.65 %)

Age group

 Age 18–30

70,281 (29.51 %)

35,748 (29.37 %)

 Age 30–40

54,917 (23.06 %)

29,680 (24.39 %)

 Age 40–50

59,998 (25.09 %)

28,478 (23.40 %)

 Age 50–63

52,984 (22.25 %)

27,794 (22.84 %)

Race (% White)^a,b

78.38

80.17

Education (% Less than high school degree)^a,b

18.33

17.25

Income (% Below poverty line)^a,b

16.30

15.45