Table 3 Comparison of functional gain and speech discrimination among the three hearing aids

Hearing aids

P02

Clip-II™

Concerto basic®

Average functional gain (dB)

20.14 ± 6.23

(95% CI: 18.66–21.54)

19.41 ± 5.40

(95% CI: 18.15–20.65)

19.44 ± 5.43

(95% CI: 18.15–20.65)

Average speech discrimination (%)

67.8 ± 17.13

(95% CI: 63.80–71.79)

67.6 ± 18.13

(95% CI: 63.37–71.83)

68.8 ± 17.91

(95% CI: 64.62–72.98)

Comparison of hearing aids

P02 VS Clip-II™

P02 VS Concerto Basic®

Clip-II™ VS Concerto Basic®

Mean difference of functional gain

0.73 ± 4.08

(95% CI: − 0.22 - 1.68)

0.70 ± 4.20

(95% CI: − 0.28 - 1.68)

0.03 ± 2.84

(95% CI: − 0.63 - 0.69)

P-value

0.13

0.16

0.93

Mean difference of speech discrimination

0.22 ± 6.7

(95% CI: − 1.55 - 1.99)

1.00 ± 6.45

(95% CI: − 0.51 - 2.50)

1.22 ± 6.43

(95% CI: − 0.28 - 2.72)

P-value

0.78

0.19

0.11