Table 2. Descriptive Statistics stratified by ‘Task’ and ‘Groups’

Task	SV			CS			EXT
Groups	Normal	Presby	p	Normal	Presby	p	Normal	Presby	p
CPP	28.3±3.6	19.7±3.8	<0.01*	23.4±2.6	18.4±3.3	<0.01*	24.2±3.2	17.9±3.5	<0.01*
CPPS	17.5±2.5	11.0±3.0	<0.01*	13.6±2.3	10.0±2.6	<0.01*	14.4±2.3	9.5±2.8	<0.01*
LHRatio	6.1±1.3	6.1±1.4	0.851	6.0±1.2	6.3±1.2	0.022	6.3±1.2	6.1±1.3	0.256

p<0.01. Presby : presbyphonia, CPP : cepstral peak prominence, CPPS : smoothed cepstral peak prominence, LHRatio : L/H spectral ratio, SV : sustained vowel, CS : continuous speech, EXT : extracted continuous speech