Table 1.

Study characteristics.

First Author Name	Years	Study Type	Location	N	Age, Median (Range)	Reference
Caffo et al.	2019	retrospective	Italy	8	74 (56–95)	[21]
Calcagno et al.	2016	prospective	France	14	69 (57–82)	[22]
Calvani et al.	2019	retrospective	Italy	14	75 (56–87)	[23]
Dabkara et al.	2018	retrospective	India	16	74.5 (59–83)	[24]
Derosa et al.	2014	prospective	Italy	17	72 (52–79)	[25]
Di Desidero et al.	2016	prospective	Italy	17	73 (63–86)	[26]
Di Lorenzo et al.	2007	prospective	Italy	18	67 (46–75)	[27]
Dickinson et al.	2012	retrospective	UK	21	75 (N/A)	[28]
Fontana et al.	2009	prospective	Italy	23	74.5 (54–91)	[29]
Fontana et al.	2010	retrospective	Italy	24	83 (78–92)	[19]
Gebbia et al.	2011	prospective	Italy	25	72 (56–83)	[30]
Glode et al.	2003	retrospective	USA	25	72.6 (54–88)	[31]
Hatano et al.	2011	retrospective	Japan	25	71 (49–90)	[32]
Jellvert et al.	2011	prospective	Sweden	28	60 (45–75)	[33]
Jeong & Lee	2017	prospective	Korea	28	71 (49–88)	[34]
Knipper et al.	2019	retrospective	Germany	28	78 (N/A)	[35]
Kubota et al.	2017	prospective	Japan	29	74.2 (66–88)	[36]
Ladoire et al.	2010	prospective	France	32	74 (55–88)	[37]
Lord et al.	2007	prospective	UK	35	69 (51–86)	[38]
Meng et al.	2012	retrospective	China	38	72.8 (69–78)	[39]
Nelius et al.	2010	prospective	USA	39	68 (42–85)	[40]
Nicolini et al.	2004	prospective	Italy	41	72 (62–84)	[41]
Nishimura et al.	2001	prospective	Japan	43	70 (50–82)	[42]
Noguchi et al.	2016	prospective	Japan	49	68.6 (48–80)	[43]
Orlandi et al.	2013	retrospective	USA	52	81 (52–92)	[44]
Tralongo et al.	2016	prospective	Italy	57	77 (72–82)	[45]
Vorob’ev et al.	2011	retrospective	Russia	58	72.8 * (56–85)	[46]
Wang et al.	2015	prospective	USA	58	76 (50–86)	[47]
Wozniak et al.	1993	prospective	USA	74	67 (55–78)	[48]
Yashi et al.	2014	prospective	Japan	37	75 (67.8–79.3)	[49]

* = mean; N = sample size, N/A = not available.