Table 5 Incidence rate ratios (IRRs) (and the 95% CI) from the negative binomial regression of deliberate self‐harm by persons aged 15–64 years on type of area, age, gender, deprivation and social fragmentation in Ireland, 2002–2004.
| Explanatory variable | IRR† (95% CI) | IRR‡ (95% CI) | IRR§ (95% CI) |
|---|---|---|---|
| Type of area | |||
| Dublin | 1.38** (1.12 to 1.70) | 1.24** (1.07 to 1.44) | 1.20** (1.05 to 1.38) |
| Other cities | 2.42*** (1.98 to 2.97) | 1.81*** (1.49 to 2.22) | 1.02 (0.64 to 1.63) |
| Urban districts | 2.83*** (2.48 to 2.23) | 1.85*** (1.64 to 2.10) | 1.34* (1.06 to 1.70) |
| Rural districts | 1.00 | 1.00 | 1.00 |
| Age | |||
| 15–39 years | 1.00 | 1.00 | |
| 40–64 years | 0.50*** (0.46 to 0.55) | 0.41*** (0.36 to 0.47) | |
| Gender | |||
| Male | 1.00 | 1.00 | |
| Female | 1.46*** (1.36 to 1.58) | 1.57*** (1.49 to 1.66) | |
| Deprivation tertile | |||
| First | 1.00 | 1.00 | |
| Second | 1.18*** (1.08 to 1.28) | 1.10 (0.99 to 1.21) | |
| Third | 1.77*** (1.55 to 2.02) | 1.52*** (1.31 to 1.76) | |
| Fragmentation tertile | |||
| First | 1.00 | 1.00 | |
| Second | 1.07 (0.97 to 1.19) | 1.01 (0.91 to 1.13) | |
| Third | 1.31*** (1.16 to 1.47) | 1.34*** (1.18 to 1.51) |
*p<0.05; **p<0.01; ***p<0.001. †Effects estimated by model including type of area only. ‡Effects estimated by model including type of area, age, gender, deprivation and social fragmentation. §Effects estimated by model including type of area, age, gender, deprivation, social fragmentation and terms representing the interactions between type of area and each of gender, age, deprivation and fragmentation, and between fragmentation and age.