Baseline characteristics of the study population
| Explanatory variables | n = 152 | Not sprayed by police number (%) | Sprayed by police number (%) | p Value for association between characteristic and spray type |
|---|---|---|---|---|
| *Data for each explanatory variable, for example, age and circumstances surrounding exposure is missing for both variables in 11 incidents. | ||||
| Age groups (y) | ||||
| <11 | 11 | 8 (29) | 3 (5) | |
| 12–18 | 11 | 7 (25) | 4 (7) | – |
| 19–25 | 17 | 7 (25) | 10 (18) | – |
| 26–36 | 31 | 6 (21) | 25 (45) | – |
| 37–46 | 9 | 0 | 9 (16) | – |
| 47 + | 5 | 0 | 5 (9) | – |
| * Age missing | 68 | |||
| Sex | ||||
| Female | 28 | 10 (23) | 18 (22.5) | |
| Male | 96 | 34 (77) | 62 (77.5) | p = 0.84 |
| *Sex missing | 28 | |||
| Directly exposed to PIS | ||||
| No | 43 | 19 (32.7) | 24 (25.8) | |
| Yes | 87 | 35 (60) | 52 (55.9) | p = 0.97 |
| Not known | 21 | 4 (7) | 17 (18) | p = 0.11 |
| *Missing | 1 | |||
| Time from exposure to consultation | ||||
| <1 hour | 34 | 22 (40) | 12 (14) | |
| >1 hour | 108 | 33 (60) | 75 (86) | p⩽0.001 |
| *Missing | 10 | |||
| Time from exposure to consultation | ||||
| <6 hours | 98 | 48 (87) | 50 (57) | |
| >6 hours | 44 | 7 (13) | 37 (43) | p⩽0.001 |
| *Missing | 10 | |||