Table 2.

Meta-analysis of the association of female lung cancer with ETS in cohort studies.

Author	Year	Country	RR	95% CI	Adjustment
Jee et al. [112]	1999	Korea	1.90	1.00–3.50	Yes: age, socioeconomic status, residency, vegetable consumption, occupation
Speize et al. [125]	1999	U.S.	1.50	0.30–6.30	Yes: age
Nishino et al. [11]	2001	Japan	1.80	0.67–4.60	Yes: age, study area, alcohol, diet, history of lung diseases
Vineis et al. [126]	2005	Europe	1.20	0.71–2.02	Yes: age, sex, smoking, country, school years
Weiss et al. [14]	2008	China	0.94	0.65–1.35	No
Kurahashi et al. [98]	2008	Japan	1.45	0.86–2.44	No
Wang et al. [13]	2015	U.S.	0.88	0.52–1.49	Yes: age, body mass index (BMI), ethnicity, history of lung cancer, family history of cancer, education, occupation, hormone therapy use, oral contraceptive use, fruit servings per day, vegetable servings per day, red meat serving per day, alcohol, physical activity
Pooled RR (Fixed effect) RR: 1.17, 95% CI: 0.94–1.44