TABLE 2.
Association of Offensive Linemen Statistics With Injury to the Anterior Cruciate Ligamenta
| Control Players (Mean) | Injured Players (Mean) | Effect of Injurya | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Before | After | Difference | Before | After | Difference | Coefficient | 95% CI | P Value | |
| Career statistics | |||||||||
| Total number of Pro Bowls | 0.10 | 0.40 | 0.30 | 0.95 | 0.40 | −0.55 | −0.85 | −1.80 to 0.10 | .079 |
| Total number of seasons | 4.00 | 4.20 | 0.20 | 4.40 | 3.25 | −1.15 | −1.35 | −4.04 to 1.34 | .316 |
| Total number of games played | 56.50 | 56.70 | 0.20 | 55.80 | 39.15 | −16.65 | −16.85 | −54.40 to 20.70 | .370 |
| Total number of games started | 47.30 | 49.75 | 2.45 | 48.00 | 32.95 | −15.05 | −17.50 | −51.54 to 16.55 | .305 |
| Mean number of games played per season | 14.18 | 13.78 | −0.40 | 15.06 | 11.20 | −3.86 | −3.46 | −13.15 to 6.25 | .477 |
| Mean number of games started per season | 12.40 | 12.58 | 0.18 | 10.41 | 8.89 | −1.52 | −1.70 | −5.27 to 1.89 | .343 |
| Number of games played per seasonb | |||||||||
| First year after injury | 13.90 | 14.20 | 0.30 | 13.50 | 12.20 | −1.30 | −1.60 | −4.7 to 1.7 | .349 |
| Second year after injury | 13.90 | 13.80 | −0.10 | 13.50 | 12.70 | −0.80 | −0.70 | −3.3 to 2.0 | .621 |
| Third year after injury | 13.90 | 13.10 | −0.80 | 13.50 | 15.20 | 1.70 | 2.50 | −0.4 to 5.5 | .089 |
| Number of games started per seasonb | |||||||||
| First year after injury | 12.00 | 13.10 | 1.10 | 12.40 | 10.00 | −2.40 | −3.50 | −7.7 to 0.7 | .101 |
| Second year after injury | 12.00 | 12.90 | 0.90 | 12.40 | 10.30 | −2.10 | −3.00 | −7.1 to 1.1 | .148 |
| Third year after injury | 12.00 | 11.30 | −0.70 | 12.40 | 13.90 | 1.50 | 2.20 | −3.1 to 7.5 | .402 |
aA statistically significant positive coefficient indicates that injury leads to an increase in player statistics after the injury, while a statistically significant negative coefficient indicates that injury leads to a decrease in player statistics after the injury. For career statistics, the Bonferroni adjustment for performance of 6 unique tests required lowering of the P value representing statistical significance to P < .008. Similarly, for seasonal statistics, the Bonferroni adjustment for performance of 6 unique tests required lowering of the P value representing statistical significance to P < .008.
bEach year after the injury was compared with the average for the 3 years before injury.