TABLE 4.
HRs and corresponding 95% CIs for the risk for injury or death as a result of transport accidents and motor vehicle accidents among individuals with TS or CTD with and without comorbid ADHD, compared with individuals unaffected by TS or CTD from the general population
| Total, n | All Serious Transport Accidents | Motor Vehicle Accidents | |||||
|---|---|---|---|---|---|---|---|
| n | % | HR (95% CI) Adjusted for Sex and Birth Year | n | % | HR (95% CI) Adjusted for Sex and Birth Year | ||
| Unaffected by TS/CTD | 6,123,841 | 340,669 | 5.56 | 1.00 | 190,376 | 3.11 | 1.00 |
| TS/CTD with comorbid ADHD | 1738 | 160 | 9.21 | 1.86 (1.59–2.17) | 118 | 6.79 | 2.02 (1.69–2.42) |
| TS/CTD without comorbid ADHD | 1711 | 111 | 6.49 | 1.18 (0.98–1.42) | 71 | 4.15 | 1.16 (0.92–1.46) |
Statistically significant HRs are highlighted in bold. P values for HR (95% CI) reported for analyses of TS/CTD with comorbid ADHD are P < 0.001. P values for analysis of TS/CTD without comorbid ADHD are P = 0.083 for all serious transport accidents and P = 0.215 for motor vehicle accidents.
Abbreviations: HR, hazard ratio; CI, confidence interval; TS, Tourette syndrome; CTD, chronic tic disorder; ADHD, attention deficit hyperactivity disorder.