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Table 3 Prevalence of insomnia and associations derived by logistic regression analysis

From: Insomnia and its correlates in a representative sample of the Greek population

Variable Insomnia, N (%) OR (95% CI) Crude OR (95% CI) Adjusted
Sex    
   Men 94(19.5) 1.00 1.00
   Women 160(30.7) 1.83* (1.37-2.45) 1.48‡ (1.03-2.10)
Age (years)    
   18-24 9(7.8) 1.00 1.00
   25-34 18(9.7) 1.26(0.55-2.93) 1.16(0.48-2.81)
   35-44 33(18.3) 2.64‡ (1.21-5.75) 2.09(0.90-4.83)
   45-54 37(24.5) 3.82*(1.76-8.29) 2.68‡ (1.17-6.14)
   55-64 55(36.7) 6.82*(3.19-14.54) 3.63† (1.59-8.28)
   > 65 102(45.5) 9.84*(4.74-20.42) 4.06† (1.79-9.17)
Family status    
   Married 179(27.7) 1.00 1.00
   Single 23(9.4) 0.27* (0.17-0.43) 0.65(0.36-1.17)
   Divorced/Widowed 52(45.2) 2.15* (1.44-3.23) 1.04(0.62-1.74)
Socioeconomic status    
   A/B-C1 30(17.9) 1.00  
   C2 116(25.1) 1.54(0.99-2.41) 1.40(0.88-2.24)
   D/E 108(28.8) 1.86†(1.18-2.93) 1.67‡ (1.03-2.69)
Level of education    
   Low 140(41.9) 1.00 1.00
   Middle 73(17.3) 0.29* (0.21-0.40) 0.59‡ (0.38-0.91)
   High 41(16.5) 0.27* (0.18-0.41) 0.58‡ (0.36-0.94)
Alcohol use    
   No 154(34.0) 1.00 1.00
   Yes 100(18.1) 0.43* (0.32-0.58) 0.56 (0.41-1.19)
Smoking    
   No 165(28.8) 1.00 1.00
   Yes 89(20.6) 0.64† (0.48-0.86) 0.96(0.65-1.41)
Physical activity    
   No 84(17.9) 1.00 1.00
   Yes 153(32.0) 2.16* (1.59-2.92) 1.42‡ (1.01-2.03)
Weight status    
   Normal (BMI < 25) 86(20.7) 1.00 1.00
   Overweight (25≤BMI < 30) 100(24.8) 1.26(0.92-1.75) 0.78(0.52-1.16)
   Obese (BMI≥30) 60(37.3) 2.28* (1.53-3.39) 1.06(0.66-1.72)
Chronic disease    
   No 100(15.5) 1.00 1.00
   Yes 154(42.8) 4.07* (3.02-5.49) 1.58‡ (1.06-2.34)
Hospitalizations in the past 12 months    
   None 201(22.8) 1.00 1.00
   One or more 50(43.5) 2.60* (1.74-3.88) 1.90‡ (1.18-3.05)
Mental health summary score (SF-36)   0.95*(0.94-0.96) 0.96*(0.95-0.97)
  1. OR = Odds Ratio, CI = 95% Confidence Interval, ‡ p < 0.05, † p < 0.01, * p < 0.001