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Table 2 Univariate factor analysis of short sleep duration and long sleep duration

From: Social-biological influences on sleep duration among adult residents of Northeastern China

Factors Short sleep duration Long sleep duration
χ 2 OR (95%CI) χ 2 OR (95%CI)
Sex 2. 18    5. 93*   
 Male    1.05 (0.98, 1.13)    0.87 (0.78, 0.97)
 Female    1     1  
Age 566. 10*    17. 57*   
 Young    1     1  
 Middle age    2.27 (2.10, 2.44)    0.86 (0.77, 0.97)
 Elderly    2.58 (2.33, 2.85)    1.17 (1.01, 1.34)
 Ethnicity 2. 44    6. 92*   
 Han    0.90 (0.79, 1.03)    1.33 (1.08, 1.64)
 Others    1     1  
Place of residence 9. 59*    66. 07*   
 Urbanite    1.12 (1.04, 1.20)    0.63 (0.56, 0.70)
 Countryside    1     1  
Marital status 187. 08*    2. 72   
 Marriage /Cohabitation    1     1  
 Unmarried    0.59 (0.51, 0.68)    1.12 (0.93, 1.34)
 Divorce/Divorcee/Separated spouse    1.75 (1.39, 2.19)    0.88 (0.56, 1.37)
 Widow/ Widower    2.18 (1.87, 2.50)    1.14 (0.89, 1.45)
Occupation 87. 80*    52. 45*   
 Mental worker    1     1  
 Manual worker    1.26 (1.15, 1.38)    1.70 (1.46, 1.98)
 Others    1.67 (1.50, 1.85)    1.83 (1.52, 2.21)
Educational level 180. 35*    125. 52*   
 Primary school or below    1     1  
 Junior middle school    0.68 (0.62, 0.75)    0.74 (0.64, 0.85)
 Senior middle school    0.73 (0.67, 0.81)    0.52 (0.45, 0.61)
 Undergraduate or above    0.48 (0.43, 0.54)    0.43 (0.36, 0.51)
Average monthly income (¥) 51. 70*    53. 30*   
 < 500    1     1  
 500-    0.77 (0.70, 0.84)    0.61 (0.53, 0.70)
 3000-    0.65 (0.57, 0.74)    0.60 (0.49, 0.75)
Cigarette smoking 63. 29*    0. 89   
 Never    1     1  
 Once    1.44 (1.28, 1.63)    1.07 (0.89, 1.30)
 Currently    1.30 (1.20, 1.40)    0.97 (0.86, 1.10)
Alcohol drinking 7. 81*    13. 04*   
 No    1     1  
 Yes    1.11 (1.03, 1.20)    0.80 (0.71, 0.90)
Dietary 30. 58*    3. 90*   
 Irregular    1     1  
 Regular    0.78 (0.71, 0.85)    0.87 (0.75, 0.99)
Physical exercise 95. 45*    40. 13*   
 Never    1     1  
 Sometimes    0.70 (0.64, 0.77)    0.70 (0.61, 0.81)
 Often    1.12 (1.03, 1.21)    0.70 (0.61, 0.79)
BMI 68. 11*    11. 94*   
 Normal    1     1  
 Underweight    0.66 (0.54, 0.81)    1.20 (1.08, 1.33)
 Overweight    1.21 (1.11, 1.30)    0.85 (0.75, 0.96)
 Obesity    1.34 (1.21, 1.49)    1.02 (1.01, 1.03)
Hypertension 147. 91*    1. 45   
 No    1     1  
 Yes    1.60 (1.48, 1.72)    1.08 (0.96, 1.21)
Diabetes 58. 15*    0. 001   
 No    1     1  
 Yes    1.41 (1.29, 1.53)    1.00 (0.86, 1.16)
Hyperlipidemia 1. 01    3. 33   
 No    1     1  
 Yes    1.04 (0.96, 1.23)    1.13 (0.99, 1.29)
CHD or MIa 69. 96*    7. 63*   
 No    1     1  
 Yes    1.68 (1.49, 1.90)    1.30 (1.08,1.57)
  1. *:P<0.05
  2. a:CHD Coronary Heart Disease, MI Myocardial Infarction
  3. 1:the reference cell