Table 4 Subgroup analysis with proportions of readmission due to overdose in the psychiatric intervention group (n=7938)
Unexposed groupIntervention group
Age, yearsNo. of patientsReadmission%No. of patientsReadmission%POdds ratio (95% confidence interval)
Total79387229.179385827.3<0.0010.79 (0.71–0.89)
12–19550478.5523448.41.0000.98 (0.64–1.51)
20–29197820410.318771548.20.0260.78 (0.62–0.97)
30–39195520510.519341849.50.3360.90 (0.73–1.11)
40–49155916410.515581147.30.0020.67 (0.52–0.86)
50–59786627.9791475.90.1370.74 (0.50–1.09)
60–69530285.3567244.20.4780.79 (0.45–1.39)
≥70580122.1688152.21.0001.06 (0.49–2.27)