Table 4. The main characteristics of the included studies on the relationship of MPV and PDW diabetic retinopathy.
| No. of | ||||||||
|---|---|---|---|---|---|---|---|---|
| Author Year | Study design | Country | Cases with DM | Cases with NPDR | Cases with PDR | Age Mean/Median | Male/Female | NOS |
| Akdoğan 2016 [50] | Retrospective | Turkey | 158 | 120 | DM:57.3±12.2 DR: 59.8±9.2 |
DM: 59/99 DR: 47/73 |
7 | |
| Ateş 2009 [51] | Retrospective | Turkey | 30 | 30 | 30 | NR | NR | 5 |
| Buch, 2017 [32] | Retrospective | India | 220 | 80 | NR | NR | 6 | |
| Citirik 2015 [23] | Prospective | Turkey | 43 | 45 | 52 | DM:60.4 ± 8.5 NPDR:61.4 ± 9.3 PDR:59.4 ± 7.2 |
DM: 22/21 NPDR: 17/28 PDR: 20/32 |
6 |
| Demirtas 2015 [53] | Prospective | Turkey | 240 | 67 | NR | NR | 7 | |
| Dindar 2013 [35] | Retrospective | Turkey | 36 | 24 | NR | NR | 6 | |
| GÜNGÖR 2016 [54] | Retrospective | Turkey | 50 | 52 | NR | DM: 19/31 DR: 18/34 |
6 | |
| Li 2014 [56] | Retrospective | China | 72 | 67 | 70 | DM:54.2 ± 9.2 NPDR:57.7± 10.0 PDR:58.3 ± 9.4 |
DM:35/37 NPDR:34/33 PDR:33/37 |
7 |
| Li 2013 [57] | Retrospective | China | 103 | 132 | NR | NR | 7 | |
| Li 2016 [58] | Retrospective | China | 52 | 47 | DM: 55.1±15.2 DR: 54.1±10.8 |
DM: 31/21 DR:26/21 |
6 | |
| Ma 2017 [59] | Retrospective | China | 20 | 20 | 20 | DM:57.3± 6.5 NPDR:60.8± 7.3 PDR:57.6 ± 7.3 |
DM:12/8 NPDR:8/12 PDR:12/8 |
5 |
| Niu 2013 [60] | Retrospective | China | 20 | 25 | DM:46.5±8.3 DR:51.2±8.3 |
DM:12/8 DR:13/12 |
6 | |
| Papanas 2004 [62] | Retrospective | Greece | 89 | 167 | NR | NR | 7 | |
| Radha 2016 [63] | Retrospective | India | 30 | 14 | NR | NR | 5 | |
| Sheng 2017 [64] | Retrospective | China | 102 | 102 | NR | NR | 7 | |
| Tetikoğlu 2016 [21] | Retrospective | Turkey | 63 | 56 | 80 | NR | NR | 6 |
| Tuzcu 2014 [52] | Retrospective | Turkey | 70 | 64 | 58 | DM: 55.8 ±10.5 NPDR: 60.1 ± 8.6 PDR: 57.5 ± 9.3 |
DM:38/32 NPDR:32/32 PDR:31/27 |
6 |
| Wei 2017 [67] | Retrospective | China | 94 | 52 | 40 | DM: 58.14 ± 11.93 DR: 58.42 ± 12.09 |
DM:50/44 DR:49/43 |
7 |
| Xu 2014 [68] | Retrospective | China | 45 | 40 | NR | DM: 23/22 DR:26/14 |
6 | |
| Yilmaz 2016 [69] | prospective | Turkey | 89 | 88 | 86 | DM: 60.9 ± 6.3 NPDR: 62.7 ± 7.2 PDR: 61.7 ± 7.9 |
DM:49/40 NPDR:48/40 PDR:49/37 |
7 |
| Yu 2000 [71] | Retrospective | China | 60 | 40 | NR | NR | 6 | |
| Yue 2015 [22] | Retrospective | China | 125 | 62 | 59 | DM: 56.00 ± 3.75 NPDR: 53.50 ± 3.56 PDR: 56.0 ± 3 |
DM:73/52 NPDR:34/28 PDR:28/31 |
6 |
| Zhang 2002 [72] | Retrospective | China | 20 | 20 | DM:58.0±9.0 DR:60.0±1.3 |
DM: 9/11 DR:8/12 |
5 | |
| Zhou 2016 [73] | Retrospective | China | 328 | 51 | DM: 57 ±16 DR: 63 ±15 |
DM: 198/130 DR: 34/17 |
6 | |
| Akdoğan 2016 [50] | Retrospective | Turkey | 158 | 120 | DM:57.3±12.2 DR: 59.8±9.2 |
DM: 59/99 DR: 47/73 |
7 | |
| Ciray 2015 [33] | Retrospective | Kazakhstan | 59 | 55 | DM: 57.8 ± 11.5 DR: 61.8 ± 10.8 |
NR | 6 | |
| Kuang 2015 [55] | Retrospective | China | 62 | 44 | 22 | DM:60.73 ± 11.24 NPDR:60.50 ± 8.45 PDR:55.18 ± 13.05 |
DM:29/33 NPDR:17/27 PDR:11/11 |
6 |
| Öztürk 2013 [61] | Retrospective | Turkey | 97 | 79 | NR | NR | NR | 6 |
| Shen 2016 [64] | Retrospective | China | 118 | 134 | 58 | DM:55.19 ± 5.51 NPDR:58.04 ± 7.53 PDR:59.84 ± 8.76 |
DM:63/55 NPDR:73/61 PDR:34/24 |
6 |
| Ulu 2013 [66] | Retrospective | Turkey | 34 | 24 | NR | NR | 6 | |
| Wei 2017 [67] | Retrospective | China | 94 | 52 | 40 | DM: 58.14 ± 11.93 DR: 58.42 ± 12.09 |
DM:50/44 DR:49/43 |
6 |
| Wang 2015 [18] | Retrospective | China | 138 | 131 | DM: 60.3 ± 6.0 DR: 66.6 ± 5.8 |
DM:65/73 DR:53/78 |
6 | |
| Yin 2015 [70] | Retrospective | China | 64 | 28 | 36 | DM: 56.83 ± 9.01 NPDR: 53.09 ± 8.82 PDR: 53.16 ± 10.64 |
DM:35/29 NPDR:13/15 PDR:19/17 |
6 |
| Yue 2015 [22] | Retrospective | China | 125 | 62 | 59 | DM: 56.00 ± 3.75 NPDR: 53.50 ± 3.56 PDR: 56.0 ± 3 |
DM:73/52 NPDR:34/28 PDR:28/31 |
6 |
| Zhou 2016 [73] | Retrospective | China | 328 | 51 | DM: 57 ±16 DR: 63 ±15 |
DM: 198/130 DR: 34/17 |
6 | |
Abbreviation: DM: Diabetes mellitus; NPDR: Non-proliferative diabetic retinopathy; PDR: Proliferative diabetic retinopathy.