Table 4

 Agreement of information on risk factors from ski patrols’ accident report forms and follow up mail questionnaires or telephone interviews for those who returned the questionnaire or completed the interview <4 months or >4 months after the injury

Risk factorTime to completion of questionnaire or telephone interview
<4 months>4 months
κ (95% CI)Agreement rating*κ (95% CI)Agreement rating*
*Based on Landis and Koch criteria for agreement (0 = poor; 0–0.2 = slight; 0.2–0.4 = fair; 0.4–0.6 = moderate; 0.6–0.8 = substantial; 0.8–1 = almost perfect).18
†Weighted κ.
Self reported ability0.63 (0.61 to 0.65)†Substantial0.60 (0.57 to 0.63)†Moderate or substantial
Age0.99 (0.98 to 0.99)†Almost perfect0.98 (0.97 to 0.99)†Almost perfect
Skiing time on day of injury0.47 (0.44 to 0.50)†Moderate0.41 (0.37 to 0.46)†Moderate
Lessons0.66 (0.63 to 0.69)Substantial0.60 (0.54 to 0.65)Moderate or substantial
Type of practice0.64 (0.61 to 0.67)Substantial0.67 (0.62 to 0.71)Substantial
Helmet use at time of injury0.89 (0.87 to 0.91)Almost perfect0.86 (0.83 to 0.89)Almost perfect
Hill difficulty0.49 (0.47 to 0.52)†Moderate0.42 (0.38 to 0.47)†Moderate