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Summary of linear regression predicting total hospital charges (ln)
| Variable, model | Sample | P value for helmet use | Unstandardized B (SE) | Interpretation |
| Helmet use, adjusted model | Matched cohort | 0.029 | −0.075 (0.034) | 8% average decrease in hospital charges |
| Helmet use, adjusted model | Entire sample | 0.009 | −0.080 (0.030) | 8% average decrease in hospital charges |
