Table 2.

Study generalities and demographic baseline of the enrolled patients

Author, year	Type of Study	Knees (n)	Follow-up (months)	Type of approach	Knees (n)	Osteoarthritis (%)	Female (%)	Mean age (years)	BMI (kg/m2)
Aslam et al. 2017 [4]	RCT	84	12	MMV	42	100	30	68.8	30.6
				MPP	42	100	57	68.6	30.1
Avci et al. 2013 [5]	RCT	39	23.5	MMV	19	100	79	64.5	32.0
Boerger et al. 2005 [6]	n-RCT	120	3	MSV	60	100	77	69.0	28.0
				MPP	60	100	75	68.0	29.0
Bridgman et al. 2009 [7]	RCT	224	13	MSV	113		48	70.1
				MPP	111		49	70.9
Chalidis et al. 2010 [8]	RCT	100	24	MMV	50	100	92	70.1	34.6
				MPP	50	100	88	71.2	34.2
Chiang et al. 2012 [9]	RCT	75	24	QS	38	100	90	69.7	28.6
				MPP	37	100	90	69.8	29.6
Cho et al. 2014 [10]	RCT	66	12	MMV	33	100	96	65.5	29.1
				MPP	33	100	94	67.0	28.0
Dabboussi et al. 2012 [13]	n-RCT	80	3	MMV	40	100
				MPP	40	100
Feczko et al. 2016 [18]	RCT	69	6	MMV	36	95	64	65.1	28.3
				MPP	33	100	67	64.9	28.6
Han et al.2008 [20]	RCT	30	24	MMPP	15	100		66.0	26.9
				MPP	15	100		64.0	26.4
Hernandez-Vaquero et al. 2010 [22]	RCT	62	6	MMV	26	100	81	70.8	32.1
				MPP	36	100	80	70.5	30.8
Huang et al. 2015 [24]	n-RCT	96	60	MMPP	35	100	86	69.2	27.0
				QS	31	100	94	69.3	26.9
				MPP	30	100	93	71.2	26.7
Jung et al.2009 [25]	n-RCT	40	58.4	MSV	21
				MPP	19
Juosponis et al. 2009 [26]	RCT	70	3	MMV	35	100	86	72.0	28.0
				MPP	35	100	86	71.4	29.1
Karachalios et al. 2008 [27]	RCT	100	23	MMV	50	92	62	71.1	32.0
				MPP	50	92	70	70.8	31.5
Karpman et al. 2009 [28]	RCT	59	6	MMV	20	100	65	74.0	30.0
				QS	20	100	60	73.0	28.0
				MPP	19	100	53	73.0	29.0
Kim et al. 2011 [29]	RCT	50	12	MMV	23	100		67.0	27.1
				MPP	22	100		68.0	28.4
King et al. 2007 [31]	n-RCT	150	1.5	QS	100	95	52	67.0	30.0
				MPP	50	90	66	28.0	32.0
Laskin et al. 2004 [33]	n-RCT	58	3	MMV	26			70.0	30.0
				MPP	26			68.0	29.0
Li et al. 2017 [34]	RCT	50	12	MSV	25	100	64	69.9	25.8
				MPP	25	100	64	68.1	25.5
Liebensteiner et al. 2012 [35]	n-RCT	38	2	MMV	19		58	66.7	30.2
				MPP	19		53	67.6	31.5
Mehta et al. 2017 [40]	RCT	55	6	MSV/MMV	26		73	59.8
				MPP	29		73	61.4
Rahman et al. 2015 [43]	n-RCT	120	3	MMPP	60	100	75	59.8
				MPP	60	100	77	62.0
Schroer et al. 2008 [46]	n-RCT	300	24	QS	150		62	71.0	31.0
				MPP	150		61	70.0	32.0
Seon et al. 2007 [47]	n-RCT	84	12	MMV	41	100	80	64.2
				MPP	43	100	77	64.2
Stevens-Lapsley et al. 2012 [48], 2013 [14]	RCT	41	3	MMPP	22	100	54	64.6	30.5
				MPP	19		45	64.0	31.3
Tasker et al. 2014 [49]	RCT	83	24	MMV/MSV	40	45	63	67.3
				MPP	43	99	63	68.2
Tenholder et al. 2005 [50]	n-RCT	118		MMPP	69		56	66.8	29.3
				MPP	49		47	63.5	31.5
Thienpont et al. 2013 [51]	RCT	300	24	MMPP	150	100	67	68.0	30.4
				MPP	150	100	70	69.0	29.8
Tsuji et al. 2010 [53]	n-RCT	20	0.5	MMV	10	100	60	68.4	28.1
				MPP	10	100	80	69.8	28.9
Unnanuntana et al. 2012 [54]	n-RCT	64	60	MMPP	31
				MPP	29
Unwin et al. 2017 [55]	RCT	66	72	MMV/MSV	32		76	67.0
				MPP	34		76	67.0
Varela-Egocheaga et al. 2009 [56]	RCT	100	36	MSV	50		72	68.0	31.0
				MPP	50		74	70.6	30.6
Watanabe et al. 2009 [57]	n-RCT	48	48	MMV	25	84	80	71.0	28.1
				MPP	23	78	74	71.0	26.3
Wegrzyn et al. 2013 [58]	RCT	36	2	MSV	18	100	72	67.0	30.0
				MPP	18	100	72	64.0	31.0
Wülker et al. 2010 [60]	RCT	134	12	MSV	66	92	73	70.2	29.3
				MPP	68	88	70	29.3
Zhu et al. 2015 [62]	n-RCT	67	109.2	MMPP	30		93	67.9	27.6
				MPP	37		84	65.3	27.7

MMV mini-midvastus, MSV mini-subvastus, QS quadriceps-sparing, MMPP mini-medial parapatellar, MPP medial parapatellar