Multiple logistic regression analyses of relationship between potentially severe head injuries and potential risk factors in 2002, 2010 and 2011
| 2002 (262/3276) | 2010 (387/4396) | 2011 (276/3436) | ||||
|---|---|---|---|---|---|---|
| OR (95% CI) | p value | OR (95% CI) | p Value | OR (95% CI) | p Value | |
| Helmet use | <0.001 | 0.03 | 0.03 | |||
| No | 1 | 1 | 1 | |||
| Yes | 0.44 (0.28 to 0.68) | 0.74 (0.57 to 0.97) | 0.67 (0.47 to 0.96) | |||
| Age | 0.58 | 0.003 | 0.73 | |||
| <13 | 1 | 1 | 1 | |||
| 13–20 | 1.26 (0.71 to 2.24) | 1.02 (0.69 to 1.49) | 0.91 (0.59 to 1.40) | |||
| >20 | 1.11 (0.62 to 1.98) | 1.16 (1.07 to 2.29) | 1.04 (0.66 to 1.64) | |||
| Gender | 0.003 | 0.45 | 0.30 | |||
| Male | 1 | 1 | 1 | |||
| Female | 0.63 (0.46 to 0.86) | 0.83 (0.65 to 1.06) | 0.85 (0.62 to 1.15) | |||
| Nationality | 0.03 | 0.001 | 0.59 | |||
| Norwegian | 1 | 1 | 1 | |||
| Swedish | 0.54 (0.35 to 0.83) | 1.1 (0.74 to 1.38) | 1.18 (0.80 to 1.76) | |||
| Danish | 0.77 (0.50 to 1.21) | 0.49 (0.34 to 0.71) | 0.82 (0.51 to 1.13) | |||
| Other | 1.00 (0.60 to 1.70) | 1.05 (0.68 to 1.52) | 0.94 (0.53 to 1.63) | |||
| Ability | 0.12 | 0.99 | 0.29 | |||
| Expert | 1 | 1 | 1 | |||
| Good | 0.93 (0.62 to 1.38) | 1.04 (0.75 to 1.44) | 1.17 (0.78 to 1.73) | |||
| Intermediate | 0.68 (0.44 to 1.05) | 1.04 (0.74 to 1.46) | 0.82 (0.52 to 1.28) | |||
| Beginner | 0.62 (0.38 to 1.03) | 1.02 (0.68 to 1.52) | 0.88 (0.51 to 1.53) | |||
| Location | 0.002 | 0.05 | 0.04 | |||
| On piste | 1 | 1 | 1 | |||
| Off-piste | 0.65 (0.38 to 1.10) | 1.24 (0.90 to 1.69) | 0.85 (0.52 to 1.42) | |||
| Park area | 1.41 (0.92 to 2.16) | 1.42 (1.00 to 2.05) | 1.58 (1.15 to 2.18) | |||
| Lift | 2.50 (1.58 to 5.12) | 1.76 (0.34 to 3.97) | 1.21 (0.45 to 2.01) | |||
| Equipment | 0.62 | 0.59 | 0.13 | |||
| Alpine | 1 | 1 | 1 | |||
| Snowboard | 0.88 (0.64 to 1.22) | 0.85 (0.66 to 1.11) | 0.69 (0.49 to 0.92) | |||
| Telemark | 0.67 (0.36 to 1.24) | 0.92 (0.46 to 1.86) | 1.40 (0.60 to 3.25) | |||
ORs are shown with 95% CIs.