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Characteristics
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Overall (n = 53 916)
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Daytime napping
|
P
|
|---|
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Habitual (n = 2757)
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Only in summer (n = 17,648)
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Non-napping (n = 33,511)
| |
|---|
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Mean age (years)
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52.0 ± 9.9
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53.1 ± 10.8
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52.9 ± 9.8
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51.3 ± 9.7
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< 0.0001
|
|
Females (%)
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58.1
|
43.1
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51.0
|
63.2
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< 0.0001
|
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High school or above (%)
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3.9
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6.7
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4.5
|
3.4
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< 0.0001
|
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Married (%)
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93.1
|
93.1
|
93.5
|
92.8
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0.0008
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Household income ≥ 35,000 (yuan) (%)
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37.8
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40.9
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38.7
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37.0
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< 0.0001
|
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Current smokers (%)
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28.0
|
26.7
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27.6
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28.5
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< 0.0001
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Current drinkers (%)
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17.1
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17.9
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17.7
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16.7
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0.0011
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Physical activities (MET-h/d)
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30.6 ± 15.3
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26.4 ± 16.3
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29.3 ± 14.9
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31.6 ± 15.1
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< 0.0001
|
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Consuming meat daily (%)
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15.2
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26.9
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16.1
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13.8
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< 0.0001
|
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Consuming fruit daily (%)
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6.7
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16.7
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7.8
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5.5
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< 0.0001
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Consuming vegetable daily (%)
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93.8
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93.7
|
92.9
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94.3
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< 0.0001
|
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BMI (kg/m2)
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22.9 ± 3.1
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23.2 ± 3.3
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23.0 ± 3.1
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22.8 ± 3.1
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< 0.0001
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WC (cm)
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76.5 ± 9.1
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77.7 ± 9.6
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76.7 ± 9.1
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76.3 ± 8.9
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< 0.0001
|
|
Sleep duration (hours)
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7.6 ± 1.2
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8.0 ± 1.3
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7.8 ± 1.2
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7.5 ± 1.1
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< 0.0001
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Postmenopausal (%)a
|
53.7
|
53.8
|
53.7
|
53.7
|
0.86
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- Data were adjusted for age and sex, as appropriate
- MET metabolic equivalent tasks, BMI Body Mass Index, WC waist circumference
- aOnly among the females
