Multivariate analyses of risk of student-related injury per 100 positions
| Total student-related claims | Lost-time student-related claims | Medical-only student-related claims | |||||||
| Claims, n | Positions*, n | Rate Ratio† (95% CI) | Claims, n | Positions*, n | Rate ratio †(95% CI) | Claims, n | Positions*, n | Rate ratio† (95% CI) | |
| Gender‡ | |||||||||
| Female (reference) | 1846 | 151 809 | 1.00 (-) | 151 | 151 809 | 1.00 (-) | 1695 | 151 809 | 1.00 (-) |
| Male | 256 | 51 107 | 0.49 (0.42 to 0.58) | 23 | 51 107 | 0.47 (0.30 to 0.71) | 233 | 51 107 | 0.48 (0.41 to 0.57) |
| Age group‡ | |||||||||
| 20 or less | 3 | 399 | 0.61 (0.10 to 3.69) | 1 | 399 | 2.83 (0.35 to 23.06) | 2 | 399 | 0.43 (0.04 to 4.75) |
| 21–30 | 345 | 25 024 | 1.16 (0.96 to 1.40) | 13 | 25 024 | 0.57 90.27 to 1.20) | 332 | 25 024 | 1.23 (1.02 to 1.48) |
| 31–40 (reference) | 467 | 42 433 | 1.00 (-) | 36 | 42 433 | 1.00 (-) | 431 | 42 433 | 1.00 (-) |
| 41–50 | 614 | 58 606 | 0.88 (0.71 to 1.08) | 54 | 58 606 | 1.03 (0.63 to 1.69) | 560 | 58 606 | 0.88 (0.71 to 1.09) |
| 51–60 | 563 | 58 922 | 0.75 (0.61 to 0.93) | 58 | 58 922 | 1.09 (1.66 to 1.80) | 505 | 58 922 | 0.73 (0.59 to 0.91) |
| 61 or older | 110 | 17 533 | 0.57 (0.43 to 0.77) | 12 | 17 533 | 0.78 (0.35 to 1.73) | 98 | 17 533 | 0.55 (0.41 to 0.74) |
*Positions=per contracted position/head count; employees may have more than one position in district, per MNDOE STAR Report. Age and gender were only reported as position (vs full-time equivalent).
†Adjusted for within-district correlation and months at-risk in the school year.
‡Obtained from the Minnesota Department of Education (MNDOE) Staff Automated Reporting (STAR) Report, 1 July 2009 through 30 June 2015.