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Table 5 The relative risk (RR) estimates with 95% confidence interval (CI) of lung cancer incidence in the age–period–cohort model for both sexes in the period of 1987–2011 in Sihui

From: Secular trend analysis of lung cancer incidence in Sihui city, China between 1987 and 2011

Parameter Subgroup Males Females
RR (95% CI) RR (95% CI)
Age (years) 35–39 0.24 (0.14, 0.38)a 0.42 (0.23, 0.73)b
40–44 0.64 (0.44, 0.94)a 0.45 (0.24, 0.80)b
45–49 Reference Reference
50–54 1.96 (1.43, 2.72)b 1.30 (0.81, 2.11)
55–59 3.14 (2.21, 4.53)a 2.37 (1.47, 3.90)b
60–64 5.15 (3.47, 7.89)a 2.77 (1.63, 4.84)b
65–69 6.90 (4.34, 11.48)a 3.71 (2.07, 6.88)a
70–74 11.26 (6.63, 20.37)a 5.53 (2.93, 10.94)a
75–79 11.63 (6.32, 23.20)a 5.55 (2.73, 11.98)a
80–84 13.56 (6.61, 30.46)a 7.29 (3.23, 17.59)a
Period (year) 1987–1991 0.81 (0.61, 1.09) 0.79 (0.52, 1.18)
1992–1996 1.00 (0.81, 1.24) 1.35 (0.99, 1.83)
1997–2001 Reference Reference
2002–2006 1.12 (0.92, 1.37) 1.18 (0.88, 1.58)
2007–2011 1.61 (1.25, 2.03)a 2.19 (1.62, 2.96)a
Cohort (year) 1910–1914 0.78 (0.45, 1.32) 1.13 (0.56, 2.28)
1915–1919 Reference Reference
1920–1924 1.13 (0.80, 1.61) 1.16 (0.69, 1.99)
1925–1929 1.56 (1.12, 2.21)b 1.92 (1.22, 3.09)b
1930–1934 1.73 (1.20, 2.57)b 2.19 (1.38, 3.61)b
1935–1939 1.51 (0.98, 2.44) 2.33 (1.40, 4.05)b
1940–1944 1.90 (1.15, 3.36)b 1.87 (1.04, 3.55)b
1945–1949 1.85 (1.04, 3.60)b 1.90 (0.98, 3.92)
1950–1954 2.05 (1.08, 4.37)b 2.57 (1.29, 5.62)b
1955–1959 1.87 (0.90, 4.41) 2.07 (0.95, 5.00)
1960–1964 1.75 (0.76, 4.58) 1.32 (0.52, 3.68)
1965–1969 1.67 (0.66, 4.91) 3.36 (1.34, 9.71)b
  1. a P < 0.001.
  2. b P < 0.05.