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Table 1 Sample characteristics

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

  N (%)
Sex  
   Men 483 (48.1)
   Women 522 (51.9)
Age (years)  
   18-24 115 (11.4)
   25-34 185 (18.4)
   35-44 180 (17.9)
   45-54 151 (15.0)
   55-64 150 (14.9)
   > 65 224 (22.3)
Family status  
   Married 646 (64.3)
   Single 244 (24.3)
   Divorced/Widowed 115 (11.4)
Socioeconomic status*  
   Upper/upper middle (A/B-C1) 168 (16.7)
   Lower middle (C2) 462 (46.0)
   Lower (D/E) 375 (37.3)
Level of education  
   Low 334 (33.2)
   Middle 422 (42.0)
   High 249 (24.8)
Alcohol use  
   No 453 (45.1)
   Yes 552 (54.9)
Smoking  
   No 572 (56.9)
   Yes 433 (43.1)
Physical activity  
   No 478 (50.5)
   Yes 469 (49.5)
Weight status  
   Normal (BMI < 25) 416 (42.4)
   Overweight (25<BMI < 30) 404 (41.2)
   Obese (BMI > 30) 161 (16.4)
Chronic disease  
   No 645 (64.2)
   Yes 360 (35.8)
Hospitalizations in the past 12 months  
   None 880 (88.4)
   One or more 115 (11.6)
Mental health problems  
   Present 50 (5.0)
   Absent 955 (95.0)
SF-36 Mental health Component Score  
   Individuals with mental problems 37.6 (SD = 11.0)
   Individuals without mental problems 48.1 (SD = 8.9)
  1. *based on the ESOMAR 1997 index categories