BACKGROUND AND OBJECTIVES: To determine appropriate counseling time for the first hearing aids user, we measured the effectiveness of first counseling time limit of 20 minutes for those who need hearing aids and collected predictive parameters during history taking. SUBJECTS AND METHOD: We reviewed the medical records of 956 patients (age 66.5±12.1) with hearing impairment who needed hearing aids. We divided patients into two groups, those who had counseling time limited to 20 minutes and others who had no time limitation. Job status, working condition of noise status, social activity and audiological variables were analyzed as probable predicting factors influencing the purchasing of the hearing aid (penetration rate). RESULTS: Of the total 956 patients, 48.64% of subjects decided to purchase hearing aids at first counseling. The two groups showed no significant difference (p=0.396): 49.81% of the group without time limitation purchased the hearing aid and 47.04% of those with time limitation purchased the aid. The social status, right side pure tone threshold and right side tinnitus were significant for calculating the explanation power (64.15%) in the hearing aid uptake probability equation. CONCLUSION: The level of social activity, hearing threshold and tinnitus were predictive variables obtained during the counseling. The time limitation of 20 minutes did not affect the rate of decision to purchase hearing aids. These results might help hearing clinics improve efficient time management at hearing aid clinics.

BACKGROUND AND OBJECTIVES: The aim of this study was to evaluate the relationship between salivary alpha-amylase (sAA) and heart rate variability (HRV) indices in SDB children based on objective parameters of polysomnography (PSG). MATERIALS AND METHOD: This prospective study enrolled 67 children who underwent a physical examination and full-attended in-lab PSG with continuous electrocardiographic signal. The sAA were measured at night before PSG and in the early morning after PSG. RESULTS: The subjects were divided into control [n=26, apnea-hypopnea index (AHI)≤1] and obstructive sleep apnea syndrome (OSAS, n=41, AHI>1) groups; the OSAS group was subdivided into mild (1 alpha-Amylases* ; Child ; Electrocardiography ; Heart Rate* ; Heart* ; Humans ; Methods ; Physical Examination ; Polysomnography ; Prospective Studies ; Saliva ; Sleep Apnea Syndromes* ; Sleep Apnea, Obstructive