Table 3. Unadjusted and adjusted Incidence Rate Ratios (95% CI) for opioid substitution treatment drug 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 | 1.38 (1.27–1.49) | 0.89 (0.81–0.97) | 1.22 (1.16–1.38) | 0.78 (0.71–0.86) |
| 25–34 | 2.72 (2.55–2.91) | 1.39 (1.29–1.50) | 1.84 (1.71–1.97) | 0.86 (0.79–0.93) |
| 35–44 | 1.82 (1.70–1.95) | 1.16 (1.08–1.25) | 1.58 (1.47–1.71) | 0.79 (0.73–0.86) |
| 45–64 | 1 | 1 | 1 | 1 |
| Townsend Score | ||||
| 1 (least deprived) | 1 | 1 | 1 | 1 |
| 2 | 1.40 (1.26–1.54) | 1.34 (1.21–1.48) | 1.37 (1.23–1.52) | 1.31 (1.18–1.46) |
| 3 | 2.07 (1.89–2.27) | 1.66 (1.51–1.83) | 1.98 (1.80–2.18) | 1.59 (1.44–1.76) |
| 4 | 3.10 (2.84–3.38) | 2.29 (2.08–2.51) | 2.75 (2.51–3.01) | 2.08 (1.89–2.29) |
| 5(most deprived) | 4.86 (4.45–5.30) | 3.01 (2.74–3.32) | 3.92 (3.58–4.30) | 2.55 (2.30–2.82) |
| Time periods | ||||
| 1994–2000 | 1.84 (1.71–1.97) | 2.14 (1.97–2.32) | 1.82 (1.69–1.97) | 2.01 (1.84–2.19) |
| 2001–2006 | 1.49 (1.41–1.58) | 1.62 (1.52–1.73) | 1.48 (1.39–1.57) | 1.59 (1.49–1.71) |
| 2006–2011 | 1 | 1 | 1 | 1 |
*Adjusted for age deprivation and time period