|
Variables
|
insomnia (PSQI > 5), %
| |
|---|
|
Overall
|
nonsmokers
|
smokers
|
p*
|
|---|
|
Age (yrs)
|
|
12–17, %
|
15.4%
|
14.6%
|
33.3%
|
< 0.001
|
|
18–29, %
|
24.7%
|
23.3%
|
30.0%
|
< 0.001
|
|
30–39, %
|
23.6%
|
21.4%
|
30.3%
|
< 0.001
|
|
40–49, %
|
25.0%
|
23.5%
|
28.2%
|
< 0.001
|
|
50–59, %
|
31.8%
|
30.0%
|
35.1%
|
0.011
|
|
≥60, %
|
45.2%
|
43.4%
|
49.5%
|
0.003
|
|
Education (yrs)
|
|
Illiteracy or Primary school%
|
32.6%
|
31.4%
|
35.9%
|
0.003
|
|
Middle school%
|
22.4%
|
20.3%
|
28.6%
|
< 0.001
|
|
High school%
|
27.0%
|
24.4%
|
34.3%
|
0.011
|
|
University%
|
26.6%
|
24.6%
|
33.5%
|
0.003
|
|
Marital status
|
|
Married %
|
26.0%
|
25.0%
|
31.2%
|
< 0.001
|
|
First marriage%
|
26.7%
|
25.0%
|
31.0%
|
–
|
|
Re-married %
|
39.6%
|
35.5%
|
46.4%
|
–
|
|
Unmarried %
|
26.6%
|
24.1%
|
37.7%
|
< 0.001
|
|
Never married%
|
22.0%
|
20.1%
|
32.5%
|
–
|
|
Divorced %
|
38.5%
|
39.6%
|
41.9%
|
–
|
|
Widowed %
|
54.2%
|
53.0%
|
57.5%
|
–
|
|
Separated %
|
35.8%
|
32.9%
|
42.0%
|
–
|
|
Regions
|
|
Rural region%
|
29.4%
|
27.3%
|
34.6%
|
< 0.001
|
|
Urban region %
|
25.5%
|
23.5%
|
31.6%
|
< 0.001
|
|
Provincial capital city%
|
27.0%
|
25.1%
|
33.5%
|
–
|
|
Prefecture-level city%
|
23.5%
|
21.3%
|
30.0%
|
–
|
|
County-level city%
|
25.9%
|
23.9%
|
31.3%
|
–
|
|
Small town%
|
24.8%
|
22.9%
|
30.7%
|
–
|
- %: the percentage of subjects. PSQI Pittsburgh Sleep Quality Index
- * Significant difference between groups of nonsmokers and smokers, p < 0.01
- Percentage differences were analyzed between nonsmokers and smokers by the Chi-squared test
