Table 5.

Comparison of estimated marginal means of delta impedance by electrode subset based on the linear mixed model, including basal (electrodes 3–6), middle (electrodes 10–13), and apical (electrodes 19–22) subsets.

Comparison	Estimate	SE	df	T-ratio	p-value
First–second implant | basal group	− 255	103	4,479	− 2.469	0.0136
First–second implant | middle group	− 50	103	4,479	− 0.484	0.6284
First–second implant | apical group	− 281	103	4,479	− 2.714	0.0067

SE, standard error; df, degrees of freedom.