Table 2 Comparisons of demographic and clinical characteristics between smoking and non-smoking groups by diagnoses.
Schizophrenia (n = 449) | Bipolar disorder (n = 464) | Major depressive disorders (n = 189) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Non-Smoking (n = 366) | Smoking (n = 83) | Non-Smoking (n = 383) | Smoking (n = 81) | Non-Smoking (n = 169) | Smoking (n = 20) | |||||||
N | % | N | % | N | % | N | % | N | % | N | % | |
Male gender | 121 | 33.1 | 76 | 91.6** | 87 | 22.7 | 61 | 75.3** | 39 | 23.1 | 17 | 85.0** |
Married/cohabitating | 124 | 33.9 | 31 | 37.3 | 167 | 43.6 | 40 | 49.4 | 118 | 69.8 | 13 | 65.0 |
First episode | 66 | 18.0 | 23 | 27.7* | 97 | 25.3 | 16 | 19.8 | 59 | 34.9 | 3 | 15.0 |
Living alone | 24 | 6.6 | 10 | 12.0 | 19 | 5.0 | 14 | 17.3* | 11 | 6.5 | 1 | 5.0 |
Personal income (>3000 RMB) | 48 | 13.1 | 16 | 19.3 | 86 | 22.5 | 32 | 39.5* | 40 | 23.7 | 6 | 30.0 |
Health insurance | 223 | 60.9 | 56 | 67.5 | 201 | 52.5 | 67 | 82.7* | 109 | 64.5 | 12 | 60.0 |
Major medical conditions | 62 | 16.9 | 15 | 18.1 | 56 | 14.6 | 16 | 19.8 | 50 | 29.6 | 5 | 25.0 |
Family history of psychiatric disorders | 123 | 33.6 | 28 | 33.7 | 119 | 31.1 | 30 | 37.0 | 36 | 21.3 | 5 | 25.0 |
Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
Age (years) | 34.2 | 13.0 | 36.1 | 11.8 | 32.8 | 13.6 | 37.1** | 11.6 | 46.3 | 15.9 | 38.1* | 14.7 |
Education (years) | 12.1 | 3.1 | 11.2* | 3.1 | 12.3 | 3.2 | 11.6 | 3.0 | 11.2 | 3.9 | 11.7 | 2.8 |
Age of onset (years) | 24.1 | 10.0 | 25.6 | 8.6 | 25.6 | 10.9 | 28.8* | 9.6 | 39.6 | 15.4 | 31.2* | 14.1 |
Length of illness (years) | 10.3 | 10.3 | 9.6 | 9.1 | 7.4 | 8.9 | 7.4 | 9.4 | 6.7 | 9.1 | 6.5 | 6.6 |
Number of admissions | 2.8 | 2.4 | 3.4 | 3.0 | 2.4 | 2.0 | 2.6 | 2.4 | 1.9 | 1.3 | 1.7 | 0.9 |
SCL90 total | 158.1 | 57.8 | 188.9* | 200.5 | 155.1 | 84.4 | 173.2 | 62.2 | 168.6 | 68.7 | 185.6 | 67.1 |
SF-12 Physical | 57.5 | 15.5 | 54.1 | 16.5 | 58.1 | 17.3 | 57.8 | 16.6 | 62.1 | 16.5 | 65.4 | 13.2 |
SF-12 Mental | 42.9 | 18.4 | 43.6 | 19.4 | 42.3 | 18.9 | 42.8 | 18.9 | 37.7 | 19.8 | 43.4 | 14.0 |
