Applied Study and Case Report
Meta-analysis study on occupational wood dust exposure association with chronic obstructive pulmonary disease
Li Pei, Wang Xin, Li Meili, Gao Ya, Zeng Qiang
Published 2019-10-20
Cite as Chin Ind Hyg Occup Dis, 2019, 37(10): 764-767. DOI: 10.3760/cma.j.issn.1001-9391.2019.10.010
Abstract
ObjectiveTo clarify the association between occupational exposure to wood dust and chronic obstructive pulmonary disease risk by a meta-analysis.
MethodsA systematic search of the studies was conducted using 3 English databases (Pubmed, Embase, and Cochrane library) and 3 Chinese databases (CNKI, WanFang, and VIP) before March 2019. The following key words was used: 1) wood, 2) hardwood, 3) softwood, 4) saw, 5) dust, 6) chronic obstructive pulmonary disease, 7) chronic obstructive airway disease, 8) lung function. A quality score was evaluated by Newcastle-Ottawa Scale, NOS (Wells, 2012). Pooled effect value with 95% confidence interval (CI) was calculated using fixed-effect model (Heterogeneity test I2<25%) or random-effect model (Heterogeneity testI2≥25%). Meta-regression was used to explore heterogeneous source. Sensitivity analysis was used to verify the stability of the results. Publication bias was assessed by Egger's test. Fill and trim method was used to correct the pool effect value with 95%CI for studies which wit publication bias. The TSA threshold was calculated by the O'Brien-Fleming loss function in the TSA data. The studies were evaluated based on the accrued information size (AIS) .
ResultsA total of 9 studies were included in the analysis. The occupational exposure to wood dust was not significantly associated with increased chronic obstructive pulmonary disease risk (ES=1.01, 95%CI: 0.856-1.194). TSA showed that the cumulative Z-value curve neither gone beyond the traditional (Z=1.96) threshold line, nor exceed the TSA threshold, but has reached the expected amount of information. This result was consistent with the meta-analysis.
ConclusionThis study does not yet consider that COPD is associated with occupational wood dust exposure.
Key words:
Dust; Occupational exposure; Pulmonary disease, chronic obstructive; Meta-analysis
Contributor Information
Li Pei
Tianjin Centers for Disease Control and Prevention, Tianjin 300011, China
Wang Xin
Li Meili
Gao Ya
Zeng Qiang