Multivariate analyses of risk factors for poisonings by intent category
| Adjusted IRRs for poisonings (95% CIs) | |||||
|---|---|---|---|---|---|
| All* | Intentional* | Unintentional* | Alcohol related* | Unknown intent† | |
| Sex | |||||
| Female | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Male | 0.43 (0.41 to 0.44) | 0.22 (0.21 to 0.23) | 0.69 (0.60 to 0.80) | 0.90 (0.84 to 0.96) | 1.24 (1.15 to 1.34) |
| Age group (years) | |||||
| 10 | 1.00 | 1.00 | 1.00 | 1.00 | Not included in multivariate model (LRT p=0.09) |
| 11 | 1.19 (1.06 to 1.35) | 1.80 (1.30 to 2.48) | 0.91 (0.62 to 1.31) | 2.84 (1.69 to 4.80) | |
| 12 | 1.92 (1.72 to 2.15) | 5.58 (4.22 to 7.40) | 1.31 (0.93 to 1.84) | 8.56 (5.32 to 13.76) | |
| 13 | 3.79 (3.43 to 4.19) | 15.59 (11.93 to 20.36) | 1.66 (1.20 to 2.31) | 24.26 (15.33 to 38.40) | |
| 14 | 6.47 (5.87 to 7.12) | 35.14 (27.01 to 45.72) | 1.92 (1.39 to 2.66) | 36.93 (23.41 to 58.26) | |
| 15 | 7.95 (7.22 to 8.76) | 48.87 (37.57 to 63.56) | 2.43 (1.77 to 3.34) | 38.18 (24.21 to 60.22) | |
| 16 | 8.02 (7.28 to 8.84) | 54.16 (41.64 to 70.45) | 2.10 (1.52 to 2.91) | 29.81 (18.87 to 47.09) | |
| 17 | 7.94 (7.21 to 8.75) | 57.09 (43.88 to 74.28) | 2.08 (1.50 to 2.87) | 21.94 (13.85 to 34.77) | |
| Calendar period | |||||
| 1992–1996 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| 1997–2001 | 1.07 (1.01 to 1.14) | 1.29 (1.18 to 1.40) | 0.61 (0.48 to 0.77) | 1.14 (0.99 to 0.31) | 0.67 (0.58 to 0.78) |
| 2002–2006 | 1.26 (1.19 to 1.33) | 1.46 (1.34 to 1.58) | 0.44 (0.35 to 0.57) | 1.24 (1.08 to 1.42) | 1.16 (1.02 to 1.32) |
| 2007–2012 | 1.27 (1.20 to 1.34) | 1.52 (1.40 to 1.64) | 0.54 (0.44 to 0.68) | 1.19 (1.05 to 1.36) | 1.06 (0.93 to 1.20) |
| Townsend Index quintile | |||||
| 1 (least deprived) | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| 2 | 1.20 (1.13 to 1.26) | 1.09 (1.02 to 1.18) | 1.20 (0.93 to 1.56) | 1.31 (1.15 to 1.49) | 1.46 (1.29 to 1.66) |
| 3 | 1.62 (1.54 to 1.71) | 1.60 (1.50 to 1.72) | 1.59 (1.25 to 2.03) | 1.55 (1.37 to 1.75) | 1.84 (1.63 to 2.08) |
| 4 | 2.00 (1.90 to 2.11) | 2.01 (1.88 to 2.15) | 1.83 (1.43 to 2.33) | 1.97 (1.75 to 2.22) | 2.18 (1.92 to 2.47) |
| 5 (most deprived) | 2.47 (2.34 to 2.60) | 2.75 (2.56 to 2.94) | 2.25 (1.75 to 2.91) | 2.65 (2.35 to 2.98) | 1.66 (1.45 to 1.90) |
| Missing | 1.32 (1.22 to 1.43) | 1.50 (1.36 to 1.66) | 1.61 (1.15 to 2.26) | 1.22 (1.01 to 1.48) | 0.73 (0.57 to 0.92) |
*Mutually adjusted for sex, age, calendar period and Townsend Index†Mutually adjusted for sex, calendar period and Townsend Index.
Interaction tests between sex and age group (likelihood ratio test): total poisonings p<0.001; intentional poisonings p<0.001; unintentional poisonings p<0.001; unknown intent poisonings—not tested as age group was not significant in the final multivariate model; alcohol related poisonings p<0.001.
Interaction tests between age group and time period (likelihood ratio test): total poisonings p<0.001; intentional poisonings p<0.001; unintentional poisonings p=0.45; unknown intent poisonings—not tested as age group was not significant in the final multivariate model; alcohol related poisonings p<0.001.
Interaction tests between sex and time period (likelihood ratio test): total poisonings p=0.004; intentional poisonings p=0.29; unintentional poisonings p=0.03; unknown intent poisonings p=0.02; alcohol related poisonings p=0.96.
LRT, likelihood ratio test.