Table 4.

Results from linear regression model with all the comorbidities, age and gender as potential confounders taken in count.

COVID-19 as an independent variable predicting Pure-Tone threshold	β1	SE β2	Beta 3	t4	P value
125 Hz	$-4.591$	$2.141$	$-0.308$	$-2.145$	$0.037$
250 Hz	$1.306$	$1.685$	$0.477$	$0.114$	$0.442$
500 Hz	$1.031$	$1.570$	$0.093$	$0.656$	$0.515$
1000 Hz	$6.053$	$1.753$	$0.436$	$3.453$	$\mathbf{0}\mathbf{.}\mathbf{001}$
2000 Hz	$3.625$	$1.691$	$0.275$	$2.143$	$\mathbf{0}\mathbf{.}\mathbf{037}$
3000 Hz	$6.249$	$2.048$	$0.337$	$3.052$	$\mathbf{0}\mathbf{.}\mathbf{004}$
4000 Hz	$9.173$	$2.264$	$0.398$	$4.052$	$<\mathbf{0}\mathbf{.}\mathbf{001}$
8000 Hz	$8.542$	$3.906$	$0.256$	$2.187$	$\mathbf{0}\mathbf{.}\mathbf{034}$
PTA5	$3.569$	$1.410$	$0.333$	$2.532$	$\mathbf{0}\mathbf{.}\mathbf{015}$

1) β stands for unstandardized regression coefficient; 2) Standard error for unstandardized regression coefficient; 3) Standardized Regression coefficient; 4) $t=\frac{\beta }{SE\beta }$; 5) Pure tone average calculated with left + right ear mean values of 500, 1000 and 2000 Hz. Statistically significant p values are highlighted in bold.