Table 1 Summary of aging-related datasets and COPD-related datasets
From: Variable DNA methylation of aging-related genes is associated with male COPD
 Data set | Sample type | Group | Gender |
|---|---|---|---|
 Aging-related dataset GSE58137 | Whole blood | 15–78 years of age (359) | Female/Male |
 Aging-related dataset GSE65219 | PBMC | 19–90 years of age (176) | Female/Male |
 Aging-related datasets GSE47728 | Whole blood | 44–87 years of age (228) | Female/Male |
 COPD-related dataset GSE56768 | Whole blood | COPD (49) / Control (31) | Female/Male |
 COPD-related dataset GSE42057 | PBMC | COPD (94) / Control (42) | Female/Male |
 COPD-related dataset GSE76705 | Whole blood | COPD (141) / Control (88) | Female/Male |
 COPD-related dataset GSE22148 | Inflammatory cells from induced sputum | Severe COPD (103) / Moderate COPD (71) | Female/Male |