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Table 1 Demographic characteristics of all participants (N = 760)

From: Current status of sleep quality in Taiwan: a nationwide walk-in survey

  Northern Middle Southern Eastern P value Total
N (%) 195 (25.7) 289 (38.0) 228 (30.0) 48 (6.3)   760 (100)
Age (years)a
 Mean ± SD 45.5 ± 12.1 53.5 ± 13.5 59.8 ± 14.6 70.1 ± 9.6 <0.001 § 54.2 ± 14.7
Gender (n, %) <0.001 §  
 Men 12 (6.5) 82 (29.8) 43 (19.0) 20 (41.7)   157 (21.4)
 Women 174 (93.6) 193 (70.2) 183 (81.0) 28 (58.3)   578 (78.6)
Sleep duration (hours)b       
Mean ± SD 5.6 ± 1.3 6.4 ± 1.2 6.3 ± 1.4 6.5 ± 1.4 <0.001 § 6.2 ± 1.4
Hypnotics use (days/4 weeks)      <0.001 §  
 No use 184 (94.4) 257 (88.9) 195 (85.5) 36 (75.0)   672 (88.4)
 1–2 4 (2.0) 13 (4.5) 14 (6.1) 1 (2.1)   32 (4.2)
 ≥3 7 (3.6) 19 (6.6) 19 (8.4) 11 (22.9)   56 (7.4)
PSQI#scorec      <0.001 §  
 Mean ± SD 7.0 ± 3.5 5.8 ± 3.4 5.7 ± 3.7 5.6 ± 4.4   6.1 ± 3.6
  1. #PSQI score: Pittsburgh Sleep Quality Index score
  2. § P value < 0.05
  3. aFour areas are significantly different
  4. b, cThe northern area is significantly different from other areas