Role of leptin in the progression of psoriatic, rheumatoid and osteoarthritis

Table 1 Summary of findings

RA				OA				PsA
Ref.	Negative correlation (n1)	Positive correlation (n1)	No correlation (n1)	Ref.	Negative correlation (n1)	Positive correlation (n1)	No correlation (n1)	Ref.	Negative correlation (n1)	Positive correlation (n1)	No correlation (n1)
[25]	37	-	-	[42]	117	-	-	[43]	-	41	-
[26]	31	-	-	[34]	-	193	-	-	-	-	-
[29]	40	-		[38]	-	543	-	-	-	-	-
[30]	167	-	-	[29]		18	-	-	-	-	-
[31]	515	-	-	[40]	-	20	-	-	-	-	-
[17]	-	76		[41]	-	219	-	-	-	-	-
[18]	-	30	-	[35]	-	-	172	-	-	-	-
[19]	-	31	-	[36]	-	-	2477	-	-	-	-
[21]	-	141		[37]	-	-	44	-	-	-	-
[22]	-	127	-	-	-	-	-	-	-	-	-
[23]	-	242	-	-	-	-	-	-	-	-	-
[28]	-	169	-	-	-	-	-	-	-	-	-
[9]	-	-	32	-	-	-	-	-	-	-	-
[10]	-	-	33	-	-	-	-	-	-	-	-
[11]	-	-	16	-	-	-	-	-	-	-	-
[12]	-	-	197	-	-	-	-	-	-	-	-
[13]	-	-	253	-	-	-	-	-	-	-	-
[14]	-	-	152	-	-	-	-	-	-	-	-
[15]	-	-	119	-	-	-	-	-	-	-	-
[16]	-	-	791	-	-	-	-	-	-	-	-
[20]	-	-	38	-	-	-	-	-	-	-	-
[27]	-	-	58	-	-	-	-	-	-	-	-
[32]	-	-	52	-	-	-	-	-	-	-	-
[33]	-	-	12	-	-	-	-		-	-	-
Total	5	7	12	9	1	5	3	1	-	1	-

¹Number of subjects in treatment group. Relationship between leptin and disease activity of RA, OA, and PsA. RA: Rheumatoid arthritis; OA: Osteoarthritis; PsA: Psoriatic arthritis.