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Table 1 General characteristics of study subjects

From: The relationship between quality of sleep and night shift rotation interval

Variables

Group A

Group B

Group C

P-valuea

Number (%)

Number (%)

Number (%)

Age

   

<0.001

 20’s

365 (84.7)

1,371 (89.2)

664 (78.1)

 

 30’s

66 (15.3)

166 (10.8)

186 (21.9)

 

Marital status

   

<0.001

 Unmarried

320 (74.2)

1,311 (85.3)

737 (86.7)

 

 Married

110 (25.5)

222 (14.4)

110 (12.9)

 

 Divorced

1 (00.2)

4 (00.3)

3 (00.4)

 

Education Level

   

<0.001

  ≤ High school

261 (60.6)

1,000 (65.1)

637 (74.9)

 

  ≥ College

170 (39.4)

537 (34.9)

213 (25.1)

 

Smoking

   

<0.001

 No

412 (95.6)

1,492 (97.1)

676 (79.5)

 

 Current

19 (04.4)

45 (02.9)

174 (20.5)

 

Alcohol consumption

   

<0.001

 No

219 (50.8)

799 (52.0)

339 (39.9)

 

 Mild

114 (26.5)

418 (27.2)

276 (32.5)

 

 Moderate

98 (22.7)

340 (22.1)

235 (27.6)

 

Obesity (BMI)

   

0.062

 18.5–24.9

322 (74.7)

1,122 (73.0)

581 (68.4)

 

  < 18.5

51 (11.8)

200 (13.0)

119 (14.0)

 

  ≥ 25.0

58 (13.5)

215 (14.0)

150 (17.6)

 

Exercise

   

0.005

  < 3 times per weeks

158 (36.7)

610 (39.7)

384 (45.2)

 

  ≥ 3 times per weeks

273 (63.3)

927 (60.3)

466 (54.8)

 

Sleep during working

   

<0.001

 No

12 (02.8)

154 (10.0)

431 (23.6)

 

 Yes

419 (97.2)

1,383 (90.0)

1,537 (76.4)

 

Job tenure

   

<0.001

  < 5 years

97 (22.5)

798 (51.9)

338 (39.8)

 

 5–9 years

181 (42.0)

384 (25.0)

293 (34.5)

 

  ≥ 10 years

153 (35.5)

355 (23.1)

219 (25.8)

 

Job tenure (Shift work)

   

<0.001

  < 5 years

100 (23.2)

811 (52.8)

341 (40.1)

 

 5–9 years

198 (45.9)

425 (27.7)

354 (41.6)

 

  ≥ 10 years

133 (35.9)

301 (19.6)

155 (18.2)

 
  1. acomparison by chi-squared test