Table 5.

Characteristics of studies about IL-10 (pg/mL) included in this meta-analysis.

Author	Year	Country	Case				Control				NOS score
			SZ	M/F	Mean	SD	SZ	M/F	Mean	SD
Acharya∗ [76]	2015	India	15	NR	11.35	0.97	15	NR	15.83	2.52	8
Dworacka∗ [77]	2015	Poland	30	17/13	4.1	1.5	30	12/13	3.8	0.9	7
You-fei [78]	2009	China	30	14/16	45.859	7.34	30	13/17	18.181	5.145	7
Ling-Xia [79]	2013	China	20	10/10	8.41	1.22	20	10/10	17.56	1.13	7
Li [80]	2014	China	63	4/6	15.69	3.22	57	5/5	24.13	2.17	8
Chen [81]	2014	China	24	NR	5.8	0.9	25	19/11	6.93	0.89	7
Lu∗ [81]	2014	China	22	NR	3.12	1.03	25	19/11	6.93	0.89	7
Hong [82]	2007	China	46	22/24	4.61	1.2	39	19/20	4.36	0.84	7
Al-Shukaili [83]	2013	Oman	57	28/29	6.95	6	30	20/10	2.9	5.15	8
Xiaojing [84]	2008	China	42	27/15	4.36	2.64	40	25/15	3.64	3.15	7
Yue-Ying [85]	2010	China	34	19/15	4	1.4	50	22/28	4.5	1.6	8
Yue-Ying∗ [85]	2010	China	50	24/26	2.7	0.9	50	22/28	4.5	1.6	8
Wei [86]	2013	China	39	NR	5.11	1.33	40	NR	4.56	1.27	7
Wei∗ [86]	2013	China	39	NR	10.52	2.43	40	NR	4.56	1.27	7
Jing [87]	2013	China	20	11/9	5	2.16	30	NR	5.07	1.32	7
Jing∗ [87]	2013	China	30	19/11	7.58	2.67	30	NR	5.07	1.32	7
Yaghini [88]	2011	Iran	131	NR	9.53	2.27	120	NR	16.11	2.27	7
Hua [89]	2015	China	61	NR	6.98	2.84	40	NR	5.83	1.37	8
Hua∗ [89]	2015	China	52	NR	30.7	9.28	40	NR	5.83	1.37	8
Zhao-Hui [90]	2014	China	50	26/24	8.39	1.18	50	24/26	17.63	1.22	8
Zhao-Hui∗ [90]	2014	China	50	28/22	1.86	0.33	50	24/26	17.63	1.22	8

DM: diabetes mellitus; SZ: sample size: M/F: man/female; SD: standard deviation; NR: not reported. ^∗T2DM with complication.