Table 1 Characteristics of patients
Characteristics | All SP | PSP | SSP | p | |
|---|---|---|---|---|---|
(n = 1990) | (n = 1632) | (n = 358) |  | ||
Sex | Â | Â | Â | Â | 0.65 |
| Â | Female, n (%) | 399 (21.8%) | 351 (21.6%) | 48 (23%) | Â |
| Â | Male, n (%) | 1435 (78.2%) | 1274 (78.4%) | 161 (77%) | Â |
Age (years), mean (SD) | 33.2 (15.6%) | 30.4 (12.6%) | 54.4 (19.9%) | < 0.0001 | |
Smoking history |  |  |  | < 0.0001 | |
| Â | Current smoker, n (%) | 885 (67.2%) | 787 (68.3%) | 98 (60.12%) | Â |
| Â | Ex-smoker, n (%) | 143 (10.9%) | 89 (7.7%) | 54 (33.13%) | Â |
| Â | Never smoker, n (%) | 288 (21.9%) | 277 (24%) | 11 (6.75%) | Â |
Cannabis, n (%) | Â | 81 (4.4%) | 77 (4.7%) | 4 (1.9%) | 0.07 |
Previous history of PS, n (%) | Â | 708 (38.5%) | 619 (37.9%) | 89 (43%) | 0.15 |