Table 1 Characteristics of Included Studies
From: Idiopathic pulmonary fibrosis and diabetes mellitus: a meta-analysis and systematic review
Study | Country | Design | NOS | IG | CG | Method of IPF Diagnosis | Method of DM Diagnosis |
|---|---|---|---|---|---|---|---|
Enomoto et al. [7] 2003 | Japan | Case–Control | 8 | 52 | 184 people matched for age and sex with no lung disease by chest radiographs | ATS/ERS criteria [66] | FBG > 6 mmol/L and/or HbAIc > 6% in combination with any treatment history |
Miyake et al. [8] 2005 | Japan | Case–Control | 8 | 104 | 56 acute bacterial pneumonia, and 4 common cold, matched by age and sex | ATS/ERS criteria [66] | Medication or diet treatment history |
Gribbin et al. [10] 2009 | United Kingdom | Case–Control | 6 | 920 | 3593 control subjects matched by age, gender and general practice | Read Code (diagnostic terms) in THIN database | Read Code |
Ma.C et al. [9] 2010 | Mexico | Case–Control | 6 | 97 | 560 patients, 461 with other pulmonary diseases and 98 with otorhinolaryngologic problems | ATS/ERS criteria [66] | FPG > 6 mmol/L. Clinical history and medication therapy were also referred to |
Garcia-Sancho et al. [24] 2011 | Mexico | Case–Control | 8 | 100 | 263 healthy control subjects matched for age, sex, and place of residence | ATS/ERS criteria [66] | Clinical symptoms and medication history |
Kim et al. [25] 2015 | Korea | Case–Control | 7 | 460 | 1925 control subjects matched with age, gender, and smoking habits | ATS/ERS/JRS/ALAT criteria [65] | FPG > 6 mmol/L together with clinical history |
Dalleywater et al. [27] 2015 | United Kingdom | Case–Control | 8 | 3211 | 12,307 control subjects, matched for age, sex, and general practice | A new diagnosis prior to previous Read Code | Read Code |
Zhong et al. [28] 2016 | China | Case–Control | 6 | 108 | 115 patients without respiratory failure or other underlying disorders | Guidance for Diagnostic and Treatment of Pulmonary Fibrosis (Chinese Thoracic Society 2002) | FPG > 6 mmol/L and/or 2-h PG > 11.1 mmol/L |
Xu et al. [26] 2020 | China | Case–Control | 7 | 44 | 88 patients without evidence of lung disease on computed tomography, matched for age and sex | ATS/ERS criteria [4] | FPG > 7 mmol/L. Clinical history was also used for diagnosis |