Table 2. Pooled results for ulnar side of branching, Lanz group 2, 3, and 4.

Study	Type	n =	Ulnar side of branching n = (%)	Lanz group 2 n = (%)	Lanz group 3 n = (%)	Lanz group 4 n = (%)
Agarwal 2014 [2]	C	52		2 (3.8%)	6 (11.5%)	1 (1.9%)
Planitzer 2013 [30]	C	21	3 (14.3%)
Mizia 2012 [8]	C	60	2 (3.3%)
Alizadeh 2006 [16]	C	60	7 (11.7%)	11 (18.3%)		11 (18.3%)
Caetano 2006 [19]	C	30	3 (10.0%)
Sacks 2006 [32]	C	48	0 (0.0%)
Barbe 2005 [18]	C	75		0 (0.0%)	2 (2.7%)	0 (0.0%)
Eskandari 2005 [20]	IO	37	0 (0.0%)
Ahn 2000 [7]	IO	354	4 (1.1%)		1 (0.3%)
Kozin 1998 [24]	C	101	0 (0.0%)
Hurwitz 1996 [22]	IO	74	1 (1.4%)
Olave 1996 [27]	C	60			1 (1.7%)
Mackinnon1988 [25]	C	50	0 (0.0%)		1 (2.0%)
Tountas 1987 [37]	IO	286	5 (1.7%)	2 (0.7%)	6 (2.1%)	6 (2.1%)
Tountas 1987 [37]	C	92	0 (0.0%)	2 (2.2%)		0 (0.0%)
Falconer 1984 [21]	C	10		2 (20.0%)		0 (0.0%)
Mumford 1986 [26]	C	20	0 (0.0%)
Perneczky 1980 [9]	C	163	3 (1.8%)	8 (4.9%)
Lanz 1977 [1]	IO	246		18 (7.3%)	7 (2.8%)	4 (1.6%)
Pooled prevalence			2.1%(95%CI:0.9%- 3.6%)	4.6%(95%CI: 1.6%- 9.1%)	2.6%(95%CI: 0.1%- 2.8%)	2.3%(95%CI: 0.3%- 5.6%)

C- cadaveric, IO—intraoperative.