Author/Editor		Šifrer, Robert
Title		Hripavost med šolarji
Type		monografija
Place		Ljubljana
Publisher		Medicinska fakulteta
Publication year		2002
Volume		str. 42
Language		slo
Abstract		BACKGROUND: Dysphonia is characterised by changes of the acoustic properties of voice which are subjectively percepted as worsening of voice quality. The causes for dysphonia can be of organic and functional origin. The incidence of dysphonia in school-age children is reported to be from 7% to 23%. The children from lower classes of elementary school are more often affected. The data on incidence of dysphonia in adolescents differ between available studies. AIM: The aim of the study was to establish the incidence of dysphonia in school children in Slovenia before and after voice mutation, and to find out the causes for voice disorders. The acoustic properties of the hoarse voices and healthy voices were determinated. HYPOTHESIS: The incidence of dysphonia in school-age children in Slovenia ranges between 7% and 23%. The causes for dysphonia in 10-year-old children are functional voice disorders and respiratory infections, while in 14-year-old children is mutational voice disorder. Fourteen year-old boys represent the majority of hoarse school children. The dysphonic voice and healthy voice do not differ in F0, The frequency perturbation (JIT) and amplitude perturbation (SH) are expected to be higher in the group of dysphonic children. METHODS: This research was prospective. The studied group consisted of 202 children from three elementary schools. One hundred children were 10 years old (4th-graders) and 102 children were 14 years old (8th-graders). They answered the questionnaires on diseases and habits affecting voice. The voice samples (spontaneous speech, text reading, vowel /a/) were recorded and analysed independently by a phoniatrician and a student using an analogue visual scale. Acoustic analysis of the vowel samples was performed and F0, JIT and SH measured. (Abstract truncated at 2000 characters).
Descriptors		HOARSENESS VOICE QUALITY CHILD INCIDENCE RESPIRATORY HYPERSENSITIVITY ASTHMA GASTROESOPHAGEAL REFLUX TOBACCO SMOKE POLLUTION PROSPECTIVE STUDIES