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) | – |