Table 1 Comparison of quality of life scores according to different population characteristics \(\stackrel{-}{\chi }\pm S\) 

Sex

Male

20

73.99 ± 11.94

5.216

0.023

Female

468

69.14 ± 9.19

Age group, years

< 29

249

70.47 ± 9.02

14.393

<0.001

29 ~ 38

195

66.88 ± 9.30

> 39

44

73.85 ± 8.77

Ethnicity

Han

329

69.53 ± 9.42

0.393

0.531

Minority

159

68.96 ± 9.24

Working years

< 5

203

69.54 ± 9.59

0.766

0.466

5–10

189

68.73 ± 9.16

>10

96

70.11 ± 9.26

Educational level

Below bachelor’s degree

345

69.18 ± 9.91

0.324

0.569

Bachelor degree or above

143

69.72 ± 9.49

Professional titles

primary

406

68.59 ± 9.42

8.835

< 0.001

intermediate

72

72.61 ± 7.81

advanced

10

76.41 ± 9.76

Marital status

Single

302

69.19 ± 9.01

0.216

0.642

Married

186

69.59 ± 9.92

Night-shift frequency

> 3 times/month

355

68.17 ± 9.34

21.332

< 0.001

≤ 3 times/month

133

72.47 ± 8.69

Smoking

Yes

9

71.17 ± 14.97

0.349

0.555

No

479

69.31 ± 9.24

Drinking

Yes

33

68.86 ± 9.36

0.095

0.759

No

455

69.38 ± 9.36