Nik Fariza Husna, Nik Hassan
(2008)
Objective and subjective evaluation of voice quality in patients with chronic
Obstructive pulmonary disease (COPD).
Masters thesis, Universiti Sains Malaysia.
Abstract
TITLE: Objective and subjective evaluation of voice quality in patient with
chronic obstructive pulmonary disease (COPD).
OBJECTIVE:
METHOD:
RESULT:
To test the null hypothesis that there is no difference in voice
quality between COPD group with the control group.
Subjects were 40 adult participants. Recruited 20 participants in
COPD group and control group of 20 participants, with the mean
age of 68.95 and 58.40 respectively. Both group underwent Vocal
Symptoms Questionaire interview, Peak Expiratory Forced Rate
(PEFR) test, voice recording and ear, nose and throat examination.
The voice was recorded and analyzed with Dr Speech's Vocal
Assessment Version 4 {Tiger DRS,US). The mean COPD and
control group were subjected to Mann-Whitney test and descriptive
analysis.
Vocal Symptom Questionaire showed the mean total vocal
symptom were significantly greater in COPD group (18.35 + 9.8)
than for the control group (4.65+ 8.5; P<O.OOl). The mean of
X Ill
CONCLUSION:
PEFR were greater for the control group (438.50+ 139.79) than
for COPD group (287.80 + 123.11; P<0.001). The vocal
assessment were analyzed in term of jitter, shimmer, harmonic to
noise ratio (HNR) and maximum phonation time. All the vocal
assessment profile mean were more than the normal value and the
Mann Whitney test were not significant (P >0.001). Full ENT
examination did not reveal any significant finding. The laryngeal
and ENT examination also shows no significant pathology to
contribute to the voice change in study participant.
In the subjective analysis, the null hypothesis is rejected. COPD
patients do complain of voice problem but the vocal assessment
did not prove the dysphonia claimed by the study group.
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