Table 1

Baseline demographic characteristics of patients in the insomnia and control groups

Insomnia (n=48 871) n (%)Control (n=97 742) n (%)P*
Age group (years)
 <349515 (19.47)19 031 (19.47)1.00
 35–4916 269 (33.29)32 541 (33.29)
 50–6413 611 (27.85)27 221 (27.85)
 ≥659476 (19.39)18 949 (19.39)
Sex
 Male19 569 (40.04)39 138 (40.04)1.00
 Female29 302 (59.96)58 604 (59.96)
Comorbidity
 Hypertension10 616 (21.72)14 781 (15.12)<0.001
 Anxiety/
 depression
4961 (10.15)1649 (1.69)<0.001
 Allergic rhinitis1742 (3.56)1561 (1.60)<0.001
 Urticaria1158 (2.37)949 (0.97)<0.001
 Atopic dermatitis247 (0.51)299 (0.31)<0.001
 Bronchiolitis57 (0.12)130 (0.13)0.44
 Sleep apnoea87 (0.18)21 (0.02)<0.001
 Cardiovascular disease4936 (10.10)6187 (6.33)<0.001
Geographic region
 North22 674 (46.40)46 019 (47.08)<0.001
 Central11 144 (22.80)17 352 (17.75)
 South13 803 (28.24)32 264 (33.01)
 East1250 (2.56)2107 (2.16)
SES (monthly insurable wage in NT$)†
 <20 00036 415 (74.51)69 456 (71.06)<0.001
 20 000–40 0008370 (17.13)18 507 (18.93)
 >40 0004086 (8.36)9779 (10.00)
  • *P determined using χ2 tests.

  • †US$1=NT$30.

  • NT$, New Taiwan dollar; SES, socioeconomic status.