Table 1. Comparison of acoustic measurements and auditory-perceptual assessments according to groups

Parameters	Normal	Presby	p-value
Age	58.1±12.1	56.1±15.0	0.383
CPP_V	28.3±3.6	19.7±3.8	<0.01†
CPPS_V	17.5±2.5	11.0±3.0	<0.01†
LHRatio_V	6.1±1.3	6.1±1.4	0.851
CPP_S	23.4±2.6	18.4±3.3	<0.01†
CPPS_S	13.6±2.3	10.0±2.6	<0.01†
LHRatio_S	6.0±1.2	6.3±1.2	0.022*
CPP_EXT	24.2±3.2	17.9±3.5	<0.01†
CPPS_EXT	14.4±2.3	9.5±2.8	<0.01†
LHRatio_EXT	6.3±1.2	6.1±1.3	0.256
Grade_V	0.0±0.0	1.6±0.7	<0.01†
OS_V	10.9±5.8	48.5±19.0	<0.01†
Grade_S	0.0±0.0	1.7±0.7	<0.01†
OS_S	13.1±7.0	48.1±18.7	<0.01†

p<0.05,
p<0.01.
Presby : presbyphonia, CPP_V : cepstral peak prominence of sustained vowel, CPPS_V : smoothed cepstral peak prominence of sustained vowel, LHRatio_V : L/H spectral ratio of sustained vowel, CPP_S : cepstral peak prominence of continuous speech, CPPS_V : smoothed cepstral peak prominence of continuous speech, LHRatio_V : L/H spectral ratio of continuous speech, CPP_EXT : cepstral peak prominence of extracted continuous speech, CPPS_EXT : smoothed cepstral peak prominence of extracted continuous speech, LHRatio_EXT : L/H spectral ratio of extracted continuous speech, Grade_V : degree of Grade on sustained vowel, OS_V : degree of overall severity on sustained vowel, Grade_S : degree of Grade on continuous speech, OS_V : degree of overall severity on continuous speech