| |
Nighttime sleep
|
P-value
|
Daytime napping
|
P-value
|
Total sleep
|
P-value
|
|---|
|
≤ 6.5 h
|
> 6.5 h
|
Non-nappers
|
≤ 45 min
|
> 45 min
|
≤ 7.0 h
|
> 7.0 h
|
|---|
|
No. subjects (%)
|
2252 (47.5)
|
2488 (52.5)
| |
2112 (43.4)
|
1752 (36.0)
|
1004 (20.6)
| |
2642 (55.7)
|
2098 (44.3)
| |
|
Age (years)
|
74.30 (6.90)
|
73.65 (7.18)
|
0.002
|
73.41 (7.03)
|
74.42 (7.10)
|
74.24 (6.98)
|
< 0.001
|
74.07 (6.88)
|
73.81 (7.27)
|
0.215
|
|
Female (%)
|
1306 (60.2)
|
1238 (51.4)
|
< 0.001
|
1169 (57.8)
|
924 (55.0)
|
516 (52.3)
|
0.014
|
1519 (59.7)
|
1025 (50.5)
|
< 0.001
|
|
BMI (kg/m2)
|
24.15 (4.29)
|
26.30 (61.86)
|
0.119
|
27.79 (86.89)
|
24.26 (4.46)
|
24.35 (4.64)
|
0.135
|
24.24 (4.75)
|
26.61 (67.59)
|
0.087
|
|
Physical activity (Met·h/week)
|
38.99 (131.08)
|
37.72 (159.27)
|
0.801
|
41.52 (198.05)
|
38.90 (110.72)
|
29.74 (36.14)
|
0.215
|
39.30 (148.82)
|
37.12 (143.81)
|
0.666
|
|
Number of family members
|
2.58 (1.35)
|
2.55 (1.19)
|
0.391
|
2.60 (1.32)
|
2.54 (1.22)
|
2.57 (1.26)
|
0.315
|
2.59 (1.33)
|
2.55 (1.18)
|
0.277
|
|
Family income (yuan, RMB)
|
6965.84 (12,668.88)
|
7253.11 (9542.72)
|
0.424
|
6889.40 (7815.00)
|
7011.88 (7484.94)
|
7733.63 (19,094.86)
|
0.188
|
6891.92 (11,754.57)
|
7393.42 (10,298.42)
|
0.164
|
|
Smoking status (%)
| | |
< 0.001
| | | |
0.375
| | |
< 0.001
|
|
Non-smoker
|
1808 (85.4)
|
1868 (80.1)
| |
1578 (81.8)
|
1405 (84.0)
|
750 (82.1)
| |
2109 (85.0)
|
1567 (79.6)
| |
|
Ex-smoker
|
172 (8.1)
|
263 (11.3)
| |
205 (10.6)
|
147 (8.8)
|
87 (9.5)
| |
218 (8.8)
|
217 (11.0)
| |
|
Current smoker
|
135 (6.4)
|
201 (8.6)
| |
146 (7.6)
|
120 (7.2)
|
76 (8.3)
| |
152 (6.1)
|
184 (9.3)
| |
|
Alcohol consumption (%)
| | |
0.525
| | | |
0.444
| | |
0.388
|
|
None or < once/month
|
1960 (89.1)
|
2156 (88.2)
| |
1778 (88.2)
|
1508 (88.0)
|
887 (90.1)
| |
2304 (89.2)
|
1812 (87.9)
| |
|
Past alcohol drinker (>once/month)
|
201 (9.1)
|
247 (10.1)
| |
204 (10.1)
|
168 (9.8)
|
84 (8.5)
| |
239 (9.2)
|
209 (10.1)
| |
|
Current alcohol drinker (>once/month)
|
39 (1.8)
|
41 (1.7)
| |
33 (1.6)
|
36 (2.1)
|
14 (1.4)
| |
41 (1.6)
|
39 (1.9)
| |
|
Any of chronic diseases (%)
|
1685 (85.9)
|
1772 (82.0)
|
0.001
|
1501 (83.0)
|
1279 (82.3)
|
740 (88.2)
|
< 0.001
|
1938 (84.9)
|
1519 (82.6)
|
0.051
|
|
Diabetes (%)
|
363 (17.8)
|
451 (19.9)
|
0.085
|
366 (19.5)
|
298 (18.9)
|
164 (17.9)
|
0.597
|
435 (18.2)
|
379 (19.8)
|
0.194
|
|
CVD (%)
|
1277 (56.7)
|
1348 (54.2)
|
0.086
|
1106 (52.4)
|
982 (56.1)
|
582 (58.0)
|
0.006
|
1447 (54.8)
|
1178 (56.1)
|
0.358
|
|
Dyslipidemia (%)
|
634 (28.2)
|
638 (25.6)
|
0.056
|
542 (25.7)
|
484 (27.6)
|
273 (27.2)
|
0.359
|
724 (27.4)
|
548 (26.1)
|
0.338
|
|
Cancer (%)
|
93 (4.7)
|
82 (3.8)
|
0.145
|
78 (4.3)
|
57 (3.7)
|
44 (5.0)
|
0.329
|
102 (4.4)
|
73 (4.0)
|
0.518
|
|
Arthritis (%)
|
389 (17.3)
|
307 (12.3)
|
< 0.001
|
266 (12.6)
|
283 (16.2)
|
160 (15.9)
|
0.003
|
424 (16.0)
|
272 (13.0)
|
0.003
|
- Unless indicated otherwise, data are given as the mean ± SD or as number and percentages
- Abbreviations: BMI body mass index, PAL physical activity level
