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Table 1 Characteristics of included studies

From: The relationship between mean platelet volume and diabetic retinopathy: a systematic review and meta-analysis

Authors Location, year DR T2DM without DR Control -Tubes NOS
N MPV N MPV N MPV
Yilmaz et al. Turkey, 2016 174 8.1 ± 0.83 88 7.81 ± 0.76 85 7.42 ± 0.68 EDTA 9
Ateş et al. Turkey, 2009 90 7.96 ± 0.76    30 7.52 ± 1.01 EDTA 9
Dindar et al. Turkey, 2013 24 11.26 ± 1.08 47 10.68 ± 1.68 50 10.23 ± 1.01 EDTA 9
Citirik et al. Turkey, 2015 97 8.08 ± 0.71 43 7.94 ± 0.63 40 7.74 ± 0.78 EDTA 8
Demirtas et al. Turkey, 2015 67 9.54 ± 0.88 240 9.2 ± 0.92    NR 8
Tetikoglu et al. Turkey, 2016 136 8.71 ± 0.82 63 8.51 ± 1 76 8.32 ± 0.9 NR 7
Müberra et al. Turkey, 2016 120 9.6 ± 1 158 9.7 ± 1.2 107 9.3 ± 1 EDTA 8
Gungor et al. Turkey, 2016 52 9.3 ± 1 50 8.8 ± 1.1 50 8.3 ± 0.6 EDTA 9
Zhong et al. China, 2011 200 10.09 ± 0.92    100 9.46 ± 0.93 NR 7
Li et al. China, 2016 47 10.72 ± 1.57 52 10.39 ± 0.9 48 9.75 ± 0.89 EDTA 8
Zhou et al. China, 2016 51 10.4 ± 1.1 328 10 ± 1.1 96 9.1 ± 0.8 NR 8
Radha et al. India, 2016 14 9.2 ± 0.61 30 8.39 ± 0.68 100 8.02 ± 0.86 EDTA 8
Buch et al. India, 2017 80 11.4 ± 1.96 162 9.91 ± 1.97 200 8.48 ± 1.01 EDTA 6
Papanas et al. Greece, 2004 167 15.8 ± 1.3 98 10.9 ± 1.1 151 7.1 ± 1.2 Citrate 6
  1. DR diabetic retinopathy, T2DM without DR type 2 diabetic mellitus without DR, N number of subjects, MPV mean platelet volume, NOS Newcastle–Ottawa scale, EDTA ethylenediaminetetraacetic acid, NR no report