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Table 1 Summary of basic characteristics of selected studies for meta-analysis

From: Association between chronic obstructive pulmonary disease and serum lipid levels: a meta-analysis

Author Year Country Sample size (COPD/Control) COPD group Control group Age (Mean ± SD, COPD/Control) BMI (Mean ± SD, COPD/Control)
Gunay S [13] 2016 Turkey 104/40 Stable COPD Healthy control 64.0 ± 8.7/62.8 ± 8.9 24.72 ± 3.91/25.08 ± 2.66
Can U [14] 2015 Turkey 51/45 Stable COPD Healthy control 56.92 ± 3.0/54.8 ± 3.8 28.76 ± 2.9/27.53 ± 3.4
Ismail M [16] 2015 Bangladesh 30/20 Stable COPD Healthy control NA NA
Boyuk B [17] 2015 Turkey 43/38 Stable COPD Healthy control NA 26.39 ± 4.99/23.67 ± 4.75
Shen Y [18] 2013 Chinese 48/32 Stable COPD Healthy control 62 ± 10/58 ± 11 22.57 ± 3.25/23.04 ± 2.62
Marquis K [19] 2005 Canada 38/34 Stable COPD Healthy control 66 ± 7/63 ± 6 28 ± 5/29 ± 5
Basili S [15] 1999 Italy 90/90 Stable COPD Healthy control 69.2 ± 8.2/67.0 ± 7.6 NA
Tisi GM [20] 1981 USA 22/22 Stable COPD Healthy control 65.3 ± 1.9/65.3 ± 1.9 NA
Fratta Pasini AM [21] 2016 Italy 30/30 Stable COPD Healthy control 69.3 ± 6.6/67.8 ± 6.8 28.3 ± 4.3/27.6 ± 4.8
Acharyya A [22] 2016 India 77/77 Stable COPD Healthy control 60 ± 12/60 ± 10 23 ± 6/24 ± 4
Rafie S [23] 2018 India 82/43 Stable COPD Healthy control 64.9 ± 7.5/63.9 ± 6.9 20.1 ± 3.9/20.7 ± 3.4