Table 1.
Demographics of smokers and non-smokers with schizophrenia.
| Variable | Smokers (n = 104) | Non-smokers (n = 26) | F or χ 2 | df | P value |
|---|---|---|---|---|---|
| Age (years) | 49.9 ± 7.5 | 56.7 ± 6.9 | 17.68 | 1,127 | <0.001 |
| Education (years) | 9.4 ± 2.4 | 10.4 ± 3.0 | 3.12 | 1,128 | 0.079 |
| Duration of illness (years) | 25.9 ± 7.6 | 32.7 ± 9.6 | 15.01 | 1,127 | <0.001 |
| Age at onset (years) | 24.1 ± 6.0 | 24.5 ± 5.9 | 0.074 | 1,128 | 0.786 |
| Number of hospitalizations | 4.0 ± 2.2 | 4.1 ± 2.3 | 0.116 | 1,128 | 0.734 |
| BMI (kg/m2) | 23.9 ± 3.8 | 24.4 ± 3.6 | 0.284 | 1,128 | 0.595 |
| Daily AP dose (mg) (CPZ equivalent) | 419.5 ± 296.2 | 406.8 ± 612.7 | 0.022 | 1,128 | 0.884 |
| Antipsychotic type: Typical/Atypical | 47/56 | 13/16 | 0.006 | 1 | >0.9 |
F, F statistic (ratio of mean squares used in ANOVA); df, degrees of freedom; AP, antipsychotic; CPZ, chlorpromazine; BMI, body mass index.