Skip to main content

Table 3 Potential sources of bias

From: Idiopathic pulmonary fibrosis and diabetes mellitus: a meta-analysis and systematic review

Study

Environmental Exposure (IG/CG)

Family IPF (IG/CG)

Enomoto et al. [7] 2003

Not stated

Not stated

Not stated

Not stated

Miyake et al. [8] 2005

31.7%

8.3%

Not stated

Not stated

Gribbin et al. [10] 2009

Not stated

Not stated

Not stated

Not stated

Ma et al. [9] 2010

dust 56.7%

smoke 66.0%

chemicals 28.9%

dust 52.1%

smoke 69.3%

chemicals 21.4%

Not stated

Not stated

Garcia-Sancho et al. [24] 2011

Matched by place of residence

Matched by place of residence

20%

8.7%

Kim et al. [25] 2015

Not stated

Not stated

Not stated

Not stated

Dalleywater et al. [27] 2015

Not stated

Not stated

Not stated

Not stated

Zhong et al. [28] 2016

Not stated

Not stated

Not stated

Not stated

Xu et al. [26] 2020

Not stated

Not stated

Not stated

Not stated

  1. IG IPF Group, CG Control Group