. 2023 Nov 30;13:19870. doi: 10.1038/s41598-023-46741-5

Table 4.

Mixed− effects regression models of stimulus level effect as a function of tinnitus status and EHFs on ABR variables.

Predictors	On AP* amp			On log (N₁/N₂)			On log (N₁/N₃)
Predictors	Est	CI	p	Est	CI	p	Est	CI	p
(Intercept)	− 0.070	− 0.090 to − 0.050	< 0.001	− 0.027	− 0.300 to 0.245	0.842	− 0.211	− 0.422 to − 0.001	0.049
Chronic	0.038	− 0.004 to 0.080	0.079	0.078	− 0.499 to 0.655	0.790	0.214	− 0.228 to 0.655	0.340
EHFs	0.001	− 0.000 to 0.003	0.083	0.010	− 0.007 to 0.027	0.243	0.013	− 0.000 to 0.027	0.055
Random effects
σ²	0.00			0.29			0.31
τ_∞	0.00_ID			0.61_ID			0.28_ID
ICC	0.25			0.67			0.48
N	67_ID			67_ID			67_ID
Observations	122			122			122
Marginal R²	0.061			0.015			0.050
Conditional R²	0.294			0.678			0.504

Predictors	On log(N₁/N₅)			On N₁* lat			On N₂* lat
Predictors	Est	CI	p	Est	CI	p	Est	CI	p
(INTERCEPT)	− 0.258	− 0.474 to − 0.043	0.019	0.216	0.169 to 0.262	< 0.001	0.201	0.154 to 0.249	< 0.001
Chronic	0.187	− 0.265 to 0.638	0.415	0.025	− 0.072 to 0.122	0.615	− 0.014	− 0.113 to 0.086	0.786
EHFs	0.011	− 0.003 to 0.025	0.108	− 0.004	− 0.007 to − 0.001	0.022	0.000	− 0.003 to 0.003	0.929
Random effects
σ²	0.32			0.04			0.03
τ_∞	0.29_ID			0.00_ID			0.01_ID
ICC	0.47			0.01			0.18
N	67_ID			67_ID			67_ID
Observations	122			122			122
Marginal R²	0.036			0.044			0.001
Conditional R²	0.493			0.055			0.181

Predictors	On N₃* lat			On N₅* lat			On N₁− N₅ lat
Predictors	Est	CI	p	Est	CI	p	Est	CI	p
(Intercept)	0.168	0.126 to 0.210	< 0.001	0.141	0.087 to 0.194	< 0.001	− 0.041	− 0.131 to 0.050	0.375
Chronic	0.002	− 0.085 to 0.090	0.956	− 0.044	− 0.155 to 0.068	0.438	− 0.036	− 0.224 to 0.152	0.704
EHFs	− 0.000	− 0.003 to 0.002	0.750	0.003	− 0.000 to 0.007	0.077	0.004	− 0.002 to 0.010	0.158
Random effects
σ²	0.03			0.05			0.08
τ_∞	0.00_ID			0.00_ID			0.04_ID
ICC	0.10						0.32
N	67_ID			67_ID			67_ID
Observations	122			122			122
Marginal R²	0.001			0.029			0.020
Conditional R²	0.101			N/A			0.331

Adj. adjusted, Chronic chronic tinnitus group, CI confidence interval, EHFs thresholds at extended high frequencies, Est. estimates.

Significant values are in bold.