Degree of hearing loss

First month

Six month

Diff-in-Diff

p

AG

BQ

Diff (AG-BQ)

p

AG

BQ

Diff (AG-BQ)

p

Mean

difference of mean

Mean

difference of mean

without covariate

28.3

30.1

−1.787

0.298

60.5

44.0

16.5

<0.001

18.3

<0.001

Adjusted for albumin serum only

39.4

41.2

−1.781

0.412

71.3

52.9

18.3

<0.001

20.1

<0.001

Adjusted for age only

16.1

18.3

−2.223

0.180

48.3

32.5

15.8

<0.001

18.0

<0.001

Adjusted for age and albumin serum

27.3

29.3

−2.02

0.335

59.1

41.3

17.8

<0.001

19.8

<0.001