Association between cooking oil fume exposure and lung cancer among Chinese nonsmoking women: a meta-analysis

Figures & data

Figure 1 Flowchart of study identification.

Table 1 Main characteristics of ten studies included in the meta-analysis of lung cancer associated with cooking oil fume exposure among nonsmoking women

Study (year)	Study location	Study period	Study design	Cases (N)	Controls (N)	Language
Ko^Citation27 (1997)	Greater Kaohsiung	1992–1993	Hospital-based case–control	310	306	English
Li et al^Citation21 (2008)	Liaoning	2002–2006	Hospital-based case–control	225	475	English
Liu^Citation28 (2000)	Shanghai	1995–1997	Population-based case–control	94	93	Chinese
Liu^Citation29 (2001)	Shanghai	1992–1993	Population-based case–control	498	595	Chinese
Metayer^Citation30 (2002)	Gansu	1994–1998	Population-based case–control	227	449	Chinese
Su^Citation31 (2014)	Liaoning	2004–2009	Hospital-based case–control	363	370	Chinese
Wang^Citation32 (1996)	Shenyang	1991–1994	Hospital-based case–control	166	166	Chinese
Yin et al^Citation26 (2014)	Shenyang	2004–2010	Hospital-based case–control	306	318	English
Zhong^Citation33 (1999)	Shanghai	1992–1994	Hospital-based case–control	504	601	English
Zhu^Citation34 (2010)	Changsha	2009	Hospital-based case–control	160	160	Chinese

Abbreviation: N, number.

Table 2 Main characteristics of four studies included in the meta-analysis of lung cancer associated with use of a kitchen ventilator when cooking among nonsmoking women

Study (year)	Study location	Study period	Study design	Cases (N)	Controls (N)	Language
Ko (1997)	Greater Kaohsiung	1992–1993	Hospital-based case–control	310	306	English
Ko^Citation35 (2000)	Greater Kaohsiung	1993–1996	Hospital-based case–control	339	1,264	English
Mu et al^Citation8 (2013)	Taiyuan	2005–2007	Hospital-based case–control	153	216	English
Yu^Citation36 (2006)	Hong Kong	2002–2004	Hospital-based case–control	251	1,069	English

Abbreviation: N, number.

Figure 2 The forest plot of OR for lung cancer with studies included in this meta-analysis.

Notes: (A) Forest plots of meta-analysis for association between cooking oil fume exposure and lung cancer among Chinese nonsmoking women. (B) Correlation of lacking a kitchen ventilator with risk of lung cancer among Chinese nonsmoking women exposed to cooking oil fume. The total RR and 95% CI are summarized with fixed effects model or random effects model.
Abbreviations: CI, confidence interval; df, degrees of freedom; RR, risk ratio; OR, odds ratio.

Figure 3 Funnel plots for the meta-analysis suggest that there was no obvious publication bias.

Notes: (A) Funnel plots for association between cooking oil fume exposure and lung cancer among Chinese nonsmoking women. (B) Funnel plots for correlation of lacking a kitchen ventilator with risk of lung cancer among Chinese nonsmoking women exposed to cooking oil fume.
Abbreviations: SE, standard error; OR, odds ratio.

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