Table 1.
The demographics and lifestyle variables of the study population. χ2; chi-square test, W; Mann-Whitney test. Variables significant at p = 0.05 are in bold and underlined.
| Variable | Controls n (%) | Cases n (%) | Test statistic | p-Value |
|---|---|---|---|---|
| Numbers | 42 (100%) | 136 (100%) | ||
| Age in years, mean (SD) | 37.55 (14.44) | 32.51 (10.12) | W = 3343.5 | 0.09 |
| Sex, male | 19 (45.24%) | 96 (71.11%) | χ2 = 7.94 | 0.005 |
| Tobacco smoking | 12 (28.57%) | 100 (73.53%) | χ2 = 15.33 | 0.001 |
| Cannabis smoking | 14 (33.33%) | 94 (69.12%) | χ2 = 4.11 | 0.04 |
| Tobacco and cannabis smoking | 9 (21.43%) | 83 (61.03%) | χ2 = 10.29 | 0.001 |
| Ethnicity | ||||
| White British | 20 (47.62%) | 38 (27.94%) | χ2 = 4.80 | 0.03 |
| Mixed | 3 (7.14%) | 5 (3.68%) | χ2 = 0.27 | 0.60 |
| White other | 5 (11.90%) | 17 (12.50%) | χ2 = 0 | 1 |
| Various Asian | 4 (9.52%) | 8 (5.88%) | χ2 = 0.22 | 0.64 |
| Black Caribbean | 3 (7.14%) | 26 (19.12%) | χ2 = 2.55 | 0.11 |
| Black African | 3 (7.14%) | 28 (20.59%) | χ2 = 3.15 | 0.08 |
| No information | 4 (9.52%) | 14 (10.29%) | χ2 = 0 | 1 |