Table 1.

Summary characteristics

	Icelandair pilots	Other pilots	All pilots
Number	286	265	551
Person-years	8514	8993	17,507
Year of birth, median (range)	1959 (1922–1978)	1946 (1901–1979)	1951
Year of license, median (range)	1987 (1944–2000)	1970 (1935–2004)	1977
Years of employment, median (range)	16 (1–43)	NA	NA
Cumulative air hours, median (range)	7961 (58–29,966)	NA	NA
Cumulative mSv, median (range)	22.55 (0.28–83.20)	NA	NA
Cumulative mSv up to age of 40 years, median (range)	5.80 (0–17.17)	NA	NA

Abbreviations: MilliSievert (mSv), and not available (NA)