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Table 1 Studies included in the meta-analysis

From: Thyroid cancer risk in airline cockpit and cabin crew: a meta-analysis

Source Data Collection Country Population Total No. (M/F) Person-years Thyroid cancer SIR (95% CI) Thyroid cancer SMR (95% CI)
Pukkala et al., 2002 [56] Various years by country (1943 to 1996 in Denmark, 1953 to 1997 in Finland, 1984 to 1997 in Iceland, 1962 to 1996 in Norway, and 1961 to 1996 in Sweden) Scandinavia (Denmark, Finland, Iceland, Norway, Sweden) Cockpit crew 10,032 (10,032/0) 177,244 0.88 (0.18–2.58)
Reynolds et al., 2002 [59] 1988–1995 US Cabin crew 52,741 (8,720/ 44,021) Not stated 0.25 (0–1.43) female only
Yong et al., 2014 [57] 1960–2008 US Cockpit crew 5,964 (5,958/6) 202,316 0.77a(0.09–2.79)
Hammer et al., 2014 [52] 1989–2004 Denmark, Finland, Germany, Greece, Iceland, Italy, Norway, Sweden, UK and the USA Cockpit crew 36,816 (36,816/0) 747,123 1.06a(0.28–2.72)
Cabin crew 44,667 (0/44,667) 1,033,146 1.53a(0.47–3.69)
dos Santos Silva et al., 2013 [58] 1989–2008 UK Cockpit crew 16,329 (15,867/462) 285,259 0.35a (0.04–1.26)
Pukkala et al., 2012 [53] 1947–2005 Finland, Iceland, Norway, and Sweden Cabin crew 10,066 (8,507/1,559) 237,627 1.01 (0.58–1.61)
Grayson et al., 1996 [39] 1975–1989 US Air Force Cockpit crew 59,940 (59,940/0) 532,980.97 1.61b(0.81–2.83; 99% CI)
Nicholas et al., 2001 [40] 1970–1998 US and Canada Cockpit crew 6,533 (6,533/0) 118,418 1.08 (0.40–2.89)
  1. athyroid and other endocrine
  2. bendocrine