Professional career length. Experience is likely to play a role in the risk of injuries. The mean length of work experience as an insured fisher was 14.7 years. Length of experience was calculated for each yearly observation period separately, using the years passed since being first insured as a fisher. With new or relatively new fishers (under 5 years of experience) as the reference group, only fishers in the most experienced category (over 30 years of experience) differed significantly from the least experienced group (OR 0.81; 95% CI 0.4–0.94).