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Table 1 Comparison of sociodemographic and occupational characteristics between non-shift and shift nurses

From: Rotating shift work and menstrual characteristics in a cohort of Chinese nurses

Variables Group P-value
  Non-shift (n = 139) Shift (n = 334)  
Age (years), mean (SD), range 28.08 (5.05), 21–45 29.49 (5.30), 21–46 0.048
BMI (kg/m2), mean (SD), range 19.73 (1.92), 15.4–27.3 20.49 (2.62), 15.2–33.5 0.003
Weight fluctuation (kg); mean (SD), range 2.72 (6.48), −5–15 1.64 (6.07), −10–20 0.176
Age at menarche (years); mean (SD), range 13.42 (1.38) 13.51 (1.23) 0.494
Work duration (years); mean (SD), range 6.82 (5.25), 1–26 7.68 (6.03),1–24 0.123
Sleep length (hours); mean (SD), range 7.32 (1.05), 6–11 6.78 (1.32), 5.5–11 0.942
Educational level; n (%)
 Technical secondary school degree 10 (7.2 %) 2(0.6 %) <0.001
 Junior college graduate degree 69 (49.6 %) 63 (18.9 %)
 Bachelor degree 6 0 (43.2 %) 264 (79.0 %)
 Master degree and above 0 (0 %) 5 (1.5 %)
Perceived job satisfaction; n (%)
 Low 1 (0.7 %) 57 (17.1 %)  
 Medium 18 (12.9 %) 135 (40.4 %) <0.001
 High 120 (86.3 %) 142 (42.5 %)  
Perceived discomfort signs; n (%)
 Insomnia, dreaminess, fatigue, dizziness, memory loss 78 (56.5) 287 (85.9)  
 Irascibility, palpitation, shortage of breath, chest distress 39 (28.3) 203 (60.8) <0.001
 Poor appetite or dyspepsia 20 (14.5) 150 (44.9)  
 Acne or hirsutism 21 (15.2) 126 (37.7)  
Pregnancy history; Yes (%) 29 (21.5) 84 (25.1) 0.319
Smoking; Yes (%) 0 0  
Alcohol consumption; Seldom (%) 330 (98.8) 129 (92.8) 0.383
Standard SDS score; mean (SD), range 32.0 (5.01), 25–50 37.5 (4.43), 30–52.50 0.024
  1. SD standard deviation