. 2023 Jul 21;154(1):418–432. doi: 10.1121/10.0019880

TABLE V.

Results of the linear mixed model regression analyses. The adjusted mean differences (MD) and p-values are presented. Superscripts indicate the reference category for calculating the adjusted MD. Frequency was used as a categorical repeated measure for all models (p < 10⁻⁸ for models 1–2, and p > 0.05 for model 3).

		Model 1: HT	Model 2: DPOAE	Model 3: ΔDPOAE
Factors		MD (in dB)	MD (in dB)	MD (in dB)
Tinnitus	Yes	1.12^b	0.6	1.05^b
	No^Ref	0	0	0
Firearm	Yes	2.6^c	−1.73^b	−1.10^a
	No^Ref	0	0	0
LNE	High	1.36^b	−0.76^b	−0.37
	Low^Ref	0	0	0
Ear infection	Yes	0.81^a	−0.90^a	−0.56
	No^Ref	0	0	0
Sex	Male	2.23^c	−1.31^b	−0.46
	Female^Ref	0	0	0
Ethnicity	European	−0.09	−1.19^b	−1.06^b
	Others^Ref	0	0	0
Ear	Right	−0.12	0.99^b	0.00
	Left^Ref	0	0	0

^{^a}

p < 0.05.

^{^b}

p < 0.001.

^{^c}

p < 10⁻⁸.