Table 1. Subject characteristics according to gander and categories of sleep duration.---Male.

	Sleep Duration				P
	<7	7–8	>8–9	>9
N	43	152	112	85
Age, y	68.00 (0.99)	67.18 (0.52)	67.62 (0.59)	69.46 (0.81)	0.083
Height, cm	171.72 (0.86)	170.01 (0.51)	169.33 (0.66)	170.59 (0.68)	0.184
Weight, kg	75.65 (1.37)	72.35 (0.85)	72.03 (0.95)	73.27 (1.09)	0.210
BMI, kg/m2	25.6 (3.83)	25.0 (2.65)	25.1 (2.93)	25.2 (3.24)	0.701
Live alone, %	25.6	17.8	9.8	11.8	0.052
Widow, %	14.0	8.6	6.3	12.9	0.321
Education, %					0.169
Illiteracy	9.3	13.2	19.6	21.2
Non-illiteracy	90.7	86.8	80.4	78.8
Farmer, %	74.4	80.9	79.5	77.6	0.816
Nonsmoker, %	41.9	49.3	33.9	34.1	0.201
Nondrinker, %	37.2	33.6	28.6	37.6	0.147
Sleep quality,%					0.051
Very well	48.5	44.7	46.4	58.8
Good	25.6	38.8	37.5	20.0
Not enough	7.0	7.2	10.7	8.2
Very poor	18.6	9.2	4.5	12.9
Sleep drug taking	9.3	7.9	8.0	9.4	0.973
IPAQ, Met/week	5279 (959)	4496 (518)	5121 (738)	3864 (684)	0.551
Grip, kg/kg	0.466 (0.012)	0.473 (0.008)	0.474 (0.008)	0.419 (0.011)	<0.001
TUGT, s	9.22 (0.27)	9.68 (0.27)	9.66 (0.18)	10.88 (0.42)	0.005
Walk speed, m/s	1.04 (0.025)	1.05 (0.015)	1.05 (0.019)	1.00 (0.027)	0.389
Skeletal muscle mass, kg	23.93 (0.49)	22.42 (0.29)	22.04 (0.31)	22.32 (0.37)	0.021
Disease, %
Diabetes	11.6	9.2	10.7	8.2	0.905
Hypertension	39.5	44.1	43.8	35.3	0.559
Hyperlipidemia	27.9	38.8	42.0	44.7	0.299
Falls, %	16.3	12.5	7.1	18.8	0.091
GDS, %					0.593
Normal	90.7	95.4	92.9	91.8
Depression	9.3	4.6	7.1	8.2

BMI, body mass index; IPAQ, international physical activity questionnaire; TUGT, timed up and go test.

Mean; Standard error in parentheses (all such values).

Obtained by using ANOVA for continuous variables and chi-square for variables of proportion.