Table 4: Sensitivity analyses: unadjusted and adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for traumatic brain injury and incarceration among men and women in Ontario from 1997 to 2011
Sensitivity analysisMenWomen
Unadjusted modelAdjusted modelUnadjusted modelAdjusted model
HR (95% CI)HR (95% CI)HR (95% CI)HR (95% CI)
Final model3.26 (2.91-3.64)2.47 (2.21-2.77)4.15 (2.15-6.86)2.76 (1.65-4.60)
Exclude participants with TBI before baseline3.84 (3.23-4.57)3.08 (2.59-3.67)2.90 (1.18-7.13)2.12 (0.86-5.23)
Exclude records probabilistically linked4.43 (3.76-5.28)3.14 (2.66-3.71)3.23 (1.42-7.38)2.08 (0.91-4.79)
Year-lagged TBI exposure3.70 (3.14-4.36)2.71 (2.30-3.20)2.60 (1.06-6.38)1.66 (0.67-4.11)
No lagged TBI exposure4.16 (3.60-4.82)3.06 (2.64-3.54)4.51 (2.35-8.62)2.93 (1.52-5.65)
Include TBI-related visits to primary care providers3.92 (3.57-4.30)3.02 (2.75-3.32)4.79 (3.22-7.12)3.78 (2.25-5.06)
Diagnosis code type
    Hospital admission4.89 (3.55-6.73)3.41 (2.47-4.71)10.19 (2.53-41.09)7.12 (1.76-28.86
    ED visit3.13 (2.78-3.52)2.40 (2.13-2.70)4.15 (2.51-6.86)2.55 (1.48-4.38)
TBI count
    01.001.001.001.00
    13.67 (3.12-4.31)2.77 (2.35-3.26)4.02 (1.96-8.25)2.70 (1.30-5.57)
     29.13 (5.92-14.05)4.50 (2.92-6.95)-*-*

Note: CI = confidence interval, ED = emergency department, HR = hazard ratio, TBI = traumatic brain injury. Values in boldface type represent confidence limits that do not cross 1.

*Estimate not provided. No women had more than 1 TBI and went on to be incarcerated.