Table 1.

Demographic characteristics of subjects

Age group, years	Gender	N (%)	Age ($$ ± SEM)	BMI ($$ ± SEM, IQR)
21–30 (N = 500)	Males	183 (36.60)	25.10±0.24	23.29±0.43c, 5.29
	Females	317 (63.40)	25.32±0.15	21.15±0.21, 3.93
31–40 (N = 207)	Males	70 (33.82)	35.20±0.33	23.86±0.53a, 5.07
	Females	137 (66.18)	34.96±0.27	22.4±0.30, 4.05
41–50 (N = 175)	Males	70 (40)	45.86±0.32	24.78±0.43, 4.22
	Females	105 (60)	45.34±0.30	23.87±0.29, 4.02
51–60 (N = 132)	Males	57 (43.18)	55.09±0.40	24.14±0.50, 3.58
	Females	75 (56.82)	55.59±0.32	24.51±0.44, 4.56
61–70 (N = 207)	Males	106 (51.21)	65.83±0.53	24.11±0.44, 4.34
	Females	101 (48.79)	65.39±0.30	24.20±0.45, 5.62
71–80 (N = 117)	Males	75 (64.10)	74.47±0.31	24.10±0.54, 3.87
	Females	42 (35.90)	74.79±0.40	24.73±0.66, 5.18
>80 (N = 67)	Males	40 (59.70)	85.55±0.64	23.17±0.48b, 4.98
	Females	27 (40.30)	85.33±0.83	21.49±0.70, 3.11
Total (N = 1,405)	Males	601 (42.78)	48.91±0.85c	23.85±0.19c, 4.74
	Females	804 (57.22)	42.03±0.64	22.61±0.14, 5.00

IQR, interquartile range. Data are expressed as mean ± SEM.

^ap < 0.05.

^bp < 0.01.

^cp < 0.0001 versus females.