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. 2012 Jul 18;345:e4627. doi: 10.1136/bmj.e4627

Table 4.

 Unadjusted and adjusted event rates per 100 000 patient years associated with stimulant use in children and young people with mental health diagnosis

Primary endpoint*
Secondary endpoint†
Unadjusted Adjusted‡ Unadjusted Adjusted‡
Full cohort:
 Non-use 3.5 (2.7 to 4.6) Reference 5.0 (4.0 to 6.2) Reference
 Current use 1.7 (0.8 to 3.5) 2.2 (1.0 to 5.1) 2.6 (1.5 to 4.8) 3.7 (1.9 to 7.3)
 Former use 1.5 (0.7 to 3.4) 2.0 (0.8 to 4.9) 2.3 (1.2 to 4.3) 3.2 (1.5 to 6.5)
Low risk cohort:
 Non-use 2.1 (1.5 to 3.0) Reference 3.1 (2.3 to 4.2) Reference
 Current use 1.0 (0.4 to 2.6) 1.0 (0.3 to 3.1) 1.5 (0.7 to 3.3) 1.6 (0.7 to 4.0)
 Former use 1.3 (0.5 to 3.1) 1.5 (0.6 to 4.0) 2.0 (1.0 to 4.1) 2.4 (1.1 to 5.2)
High risk cohort:
 Non-use 75.2 (49.5 to 114.1) Reference 99.1 (68.9 to 142.6) Reference
 Current use 51.5 (16.6 to 159.7) 76.7 (21.0 to 277.3) 85.8 (35.7 to 206.2) 154.6 (55.5 to 430.0)
 Former use 17.0 (2.4 to 120.5) 24.1 (3.1 to 183.4) 17.0 (2.4 to 120.5) 27.7 (4.0 to 208.1)
Injury censored cohort:
 Non-use 2.4 (1.7 to 3.4) Reference 3.4 (2.6 to 4.6) Reference
 Current use 1.2 (0.5 to 3.3) 1.6 (0.5 to 4.8) 1.5 (0.6 to 3.7) 2.1 (0.8 to 5.7)
 Former use 1.0 (0.3 to 3.0) 1.3 (0.4 to 4.3) 1.6 (0.7 to 3.9) 2.2 (1.1 to 4.5)

*Sudden cardiac death, acute myocardial infarction, stroke.

†Sudden cardiac death, acute myocardial infarction, stroke, ventricular arrhythmia

‡Calculated by multiplying crude event rate of non-users by respective adjusted odds ratios.