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. 2006 Apr 21;62(5):573–581. doi: 10.1111/j.1365-2125.2006.02668.x

Table 4.

All overdoses

Age group Sex Fitted value at 1996 Q1 Fitted value at 2002 Q3 Ratio at reference times (95% CI) P
Child F 128 68 0.53 (0.48, 0.59) P < 2 × 10−16
M 153 77 0.50 (0.45, 0.55) P < 2 × 10−16
Youth F 560 482 0.86 (0.82, 0.90) P < 2.2 × 10−9
M 269 217 0.81 (0.76, 0.85) P = 2.2 × 10−13
Adult F 1929 2003 1.04 (1.01, 1.07) P = 0.010
M 1708 1662 0.97 (0.94, 1.003) P = 0.075
Elderly F 135 149 1.12 (1.02, 1.22) P = 0.015
M 76 11 1.05 (0.96, 1.15) P = 0.32

Fitted values and their ratios from the statistical model are shown at the reference times stratified by Age and Sex.