| Risk Estimate | |||
|
| Value | 95% Confidence Interval | |
| Upper | Lower | ||
| Odds ratio for modified grading (none & mild vs. moderate & severe) | 0.451 | 0.206 | 0.989 |
| For cohort scars (none & mild) | 0.758 | 0.593 | 0.969 |
| For cohort scars (moderate & severe) | 1.681 | 0.970 | 2.914 |
| Number of valid cases | 151 |
| |