The vocal training and regular examinations by otolaryngologists that children who sing in choirs receive may pay off beyond voice training to benefit their overall vocal health, according to data from a recently published study that showed voice disorders were less common in a cohort of children singing in a choir compared to children who did not (JAMA Otolaryngol Head Neck Surg [published online ahead of print March 14, 2019]. doi: 10.1001/jamaoto.2019.0066).
“These findings suggest that there is a negative association between singing in a children’s choir and the presence of voice disorders,” said lead author of the study, Pedro Clarós, MD, PhD, who is with the Clarós Otorhinolaryngology Clinic in Barcelona, Spain.
The prospective cohort study was conducted to more fully examine whether an association exists between the development of vocal disorders and children who sing in a choir. According to the study authors, examination of this association in prepubescent children is lacking. To fill that gap, investigators enrolled 1,495 children (aged 8 to 14 years) from four local schools in Barcelona, Spain between October 2016 and April 2018. Of the children enrolled, 752 sang in a children’s choir and 743 children did not. Children in the choirs sang for a mean time of 7.5 hours per week for 2.5 years.
All children underwent videolaryngoscopy followed by videostroboscopy to assess the effect of singing or not singing in a choir on voice disorders (primary outcome). The study also looked at voice symptom complaints using surveys and the GRBAS (grade, roughness, breathiness, asthenia, strain) scale measurements (secondary outcomes).
The study found 12 voice disorders that were more common among the children who did not sing compared to those who did (32.4% vs 15.6%), with both functional voice disorders and organic voice disorders occurring more frequently in the non-singing children than the singing children (20.2% vs. 9.4% and 12.2% and 6.1%, respectively). Voice complaints or dysphonia were also higher in the children who did not sing in choirs compared to those who did (28.9% vs 21.0%) as reported by both the children and their parents, teachers, and choir directors. Muscle tension dysphonia (MTD) accounted for the largest difference between the two groups overall (17.2% vs. 8.4%) followed by psychogenic dysphonia (3.0% vs. 1.1%) and vocal fold nodules (7.9% vs. 4.0%).
These findings suggest that professional voice care that includes speech therapists and frequent otorhinolaryngologic examinations may be an important intervention to prevent or reduce voice disorders in children who sing in choirs, according to Dr. Clarós.