Table 3 Comparison among the 5 studied groups regarding frequency amplitude ratio (FAR) of cVEMP air conduction

Gr 1: 20–29 years

Mean

0.66

0.71

SD

0.18

0.23

Min

0.433

0.421

Max

0.959

1.25

95% CI

0.56–0.75

0.59–0.83

Gr 2: 30–39 years

Mean

0.71

0.65

SD

0.24

0.22

Min

0.22

0.27

Max

0.96

1

95% CI

0.58–0.84

0.53–0.77

Gr 3: 40–49 years

Mean

0.67

0.67

SD

0.2

0.22

Min

0.41

0.35

Max

0.97

1.09

95% CI

0.57–0.78

0.56–0.79

Gr 4: 50–59 years

Mean

0.96

1.03

SD

0.15

0.24

Min

0.64

0.71

Max

1.12

1.56

95% CI

0.86–1.05

0.88–1.18

Gr 5: > 60 years

Mean

0.89

0.86

SD

0.26

0.25

Min

0.446

0.6

Max

1.23

1.43

95% CI

0.69–1.09

0.67–1.06

F

5.515

6.212

P

0.001*

0.001*