Table 3.

Overview of studies that examine speech perception in relation to scalar location of electrode arrays. UV = univariate; MV = multivariate; ST = scala tympani; SV = scala vestibuli; LW = lateral wall; MS = mid‐scala; PM = perimodiolar; CT = computed tomography.

Study (year)	Method for determining electrode location	Statistical analysis	Number Implants (n)	Findings
Skinner et al (2007)	Pre‐ and post‐operative CT	UV	15	Negative correlation between number of electrode contacts in the scala vestibuli and CNC score
Aschendorff et al (2007)	Rotational tomography	UV	43	In patients with short duration deafness, Freiburg numbers and Oldenburg sentence scores were higher for ST insertions than SV insertions
Finley et al (2008)	Pre‐ and post‐operative CT	MV	14	Overall scalar position of the electrode array and number of electrode contacts in the scala vestibuli accounted for significant variance in CNC score
Holden et al (2013)	Pre‐ and post‐operative CT	MV	114	The percentage of electrode contacts in the SV inversely correlated with CNC score
Wanna et al (2014)	Pre‐ and post‐operative CT	UV	116	CNC score was higher for ST insertion (49%) than SV insertion (36%)
O'Connell et al (2016)	Pre‐ and post‐operative CT	MV	220	CNC score was higher for ST insertion (51%) than SV insertion (39%)
				AzBio score was higher for ST insertion (61%) than SV insertion (50%)
				SV insertion associated with 12% decrease in CNC score in MV analysis