Table 4. Unadjusted and adjusted Incidence Rate Ratios (95% CI) for opioid substitution treatment Read codes by age-band, deprivation and time period (1994–2012).
| Demographics | Unadjusted IRR (95% CI) | Adjusted IRR (95% CI) | ||
|---|---|---|---|---|
| Males | Females | Males | Females | |
| Age-band | ||||
| 16–24 | 4.46 (4.01–4.96) | 5.94 (5.14–6.86) | 4.64 (4.16–5.17) | 4.85 (4.19–5.63) |
| 25–34 | 10.3(9.40–11.31) | 9.24(8.09–10.55) | 7.87 (7.14–8.67) | 5.09 (4.43–5.84) |
| 35–44 | 5.39 (4.89–5.95) | 4.05 (3.50–4.68) | 3.79 (3.42–4.20) | 2.49 (2.15–2.90) |
| 45–64 | 1 | 1 | 1 | 1 |
| Townsend Score | ||||
| 1 (least deprived) | 1 | 1 | 1 | 1 |
| 2 | 1.74 (1.52–1.99) | 1.64 (1.34–2.01) | 1.69 (1.48–1.94) | 1.57 (1.28–1.92) |
| 3 | 3.03 (2.67–3.42) | 3.42 (2.86–4.08) | 2.72 (2.40–3.08) | 2.97 (2.48–3.55) |
| 4 | 5.89 (5.25–6.61) | 6.11 (5.16–7.24) | 4.66 (4.15–5.24) | 4.59 (3.88–5.44) |
| 5(most deprived) | 11.2(10.0–12.6) | 10.9(9.19–12.8) | 8.21 (7.33–9.20) | 7.51 (6.35–8.88) |
| Time | ||||
| 1994–2000 | 2.11 (1.94–2.30) | 2.33 (2.05–2.65) | 2.09 (1.91–2.28) | 2.09 (1.91–2.28) |
| 2001–2006 | 1.51 (1.43–1.61) | 1.81 (1.66–1.97) | 1.49 (1.39–1.58) | 1.49 (1.39–1.58) |
| 2006–2011 | 1 | 1 | 1 | 1 |
*Adjusted for age deprivation and time period