Systematic Review of the Effects of Asbestos Exposure on the Risk of Cancer between Children and Adults

Table 3 The relationship between age at first asbestos exposure and lung cancer

Study (Type of risk)	Age at first exposure	Risk	95% CI ^a
Chen M (2012) [22] (SMR^b)	< 20 years	7.70	3.7-14.2
Chen M (2012) [22] (SMR^b)	≥ 20 years	8.50	2.3-21.8
Pira E (2007) [25] (SMR^b)	< 25 years	281	Does not include 100
	25-34 years	424	Does not include 100
	≥ 35 years	269	Does not include 100
Luce D (2000) [27] (OR^c)	Men
	Birth	0.93^d	0.5-1.8
	< 20 years	0.72^d	0.2-3.1
	≥ 20 years	0.85^d	0.3-2.9
	Women
	Birth	2.51^d	0.9-6.8
	< 20 years	2.03^d	0.2-25.9
	≥ 20 years	2.93^d	0.3-25.5

^a CI Confidence intervals.
^b SMR Standardized Mortality Ratio.
^c OR Odds Ratio.
^d Odds ratio adjusted for age (≤55, 56–65, >65 years) and smoking in pack-years: four categories for men (<20, 20–39, 40–59, ≥60) and three categories for women (never smoker, <20, ≥20).

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