Table 1.

Baseline characteristics of the included studies in the meta-analysis

ID	First author	Publication year	Study population	Mean age (yrs)	Age range (yrs)	Sample size	Prevalence of NAFLD (%)
							Total	Mild	Moderate	Severe
1	Alavian	2008	Children and adolescent	—	7–18	966	7.1	6	1.03	0.1
2	Amirkhalili	2014	Adults	45.3	18–90	5023	43.8	—	—	—
3	Eshraghian	2013	Adult	—	>18	832	15.3	—	—	—
4	Hosseinpanah	2007	type 2 diabetes patient	60	41–83	76	82.9	36.8	35.5	10.5
5	Jafarian	2014	Adults	33	20–60	116	12.9	10.3	1.7	0.9
6	Jamali	2008	Adults		18–75	2049	2.04	1.4	0.7	0
7	Bagheri Lankarani	2013	Adults	43.1	18–88	819	43.5	22	16.4	5.1
8	Karimi-Sari	2015	Adults	33.9	—	114	16.7	7.9	3.5	5.3
9	Merat	2009	Type 2 diabetes patient	—	—	172	55.8	—	—	—
10	Merat	2012	Adults	47	11–94	896	16.3	—	—	—
11	Razavizade	2012	Adults	41.6	18–77	254	78.4	58.7	18.5	1.2
12	Montazerifar	2014	Obese adolescents	16	11–19	34	44.1	41.2	2.9	0
13	Rafeey	2009	Children and adolescent	—	6–15	1500	2.3	1.2	0.9	0.2
14	Saki	2014	Obese Children	10.6	5–17	102	54.9	43.1	11.8	0
15	Hosseini	2011	Children and adolescent	12.5	6–18	931	16.8	—	—	—
16	Shahbazian	2011	Type 2 diabetic patients	51.2	—	272	70	42.3	24.3	2.9
17	Taghavi Ardakani	2015	Obese children	9.1	5–15	200	59	54	5	0
18	Tazhibi	2010	Children and adolescent	—	6–18	1107	16.9	—	—	—
19	Adibi	2009	Children and adolescent	12.5	6–18	952	16.9	—	—	—
20	Alavian	2008	Adults	41.6	7–79	1120	9.5	—	—	—
21	Savadkoohi	2003	Adults	43.6	30–60	247	32.8	19.8	12.9	0
22	Arani	2015	Obese children and adolescent	9.5	4–18	360	55.3	49.3	3.9	0
23	Ostovaneh	2015	Adults	—	18–70	7723	35.2	—	—	—