Department of Otorhinolaryngology Head and Neck Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.
Department of Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia.
J Voice. 2022 Jul;36(4):457-463. doi: 10.1016/j.jvoice.2020.07.015. Epub 2020 Aug 27.
Maximum phonation time (MPT) is a test to measure glottic efficiency for laryngeal pathology screening and treatment monitoring. The normative value of MPT for South East Asia population has yet to be reported. It is postulated that MPT may be affected by body mass index (BMI) despite the paucity of evidence. Therefore, this study was designed to establish the normative value of MPT for a South East Asia population and investigate its relation to BMI.
DESIGN & SETTING: This cross-sectional study was conducted in Universiti Kebangsaan Malaysia Medical Center between May and September 2017.
Three hundred males and females with mean age of 30.23 (±11.04) years were recruited in equal number for each gender (n = 150) and divided into 3 groups of 50 according to their BMI (n = 50). The three groups are non-obese (BMI≤22.9kg/m); obese (BMI between 23 and 34.9 kg/m); and morbidly obese (BMI >35kg/m). BMI and Voice Handicap Index-10 (VHI-10) were obtained. The average of three readings of MPT was measured using a stopwatch while the participants phonate /a/, /i/ and /u/. Unpaired t-test and ANOVA were used to compare means between and across groups. Spearman correlation assessed the correlation between MPT and BMI.
The normative values of MPT of both genders and correlation with BMI were analyzed.
The MPT normative values for males and females in the non-obese group were of 21.41 (±6.85) seconds and 18.05 (±5.06)seconds respectively for /a/. The MPT for all vowels were significantly higher in males across the BMI groups (P ≤ 0.05). There was low negative correlation between MPT and BMI in both genders.
This pioneering study documented the normative values of MPT among Malaysians showed that males had longer MPT than females across the BMI groups. Obesity affects the MPT in that as BMI increases, the MPT decreases.
最大发音时间（MPT）是一种用于评估喉病理学筛查和治疗监测的声带效率的测试。目前还没有报道东南亚人群的 MPT 正常值。尽管证据不足，但有人假设 MPT 可能会受到体重指数（BMI）的影响。因此，本研究旨在为东南亚人群建立 MPT 的正常值，并探讨其与 BMI 的关系。
本横断面研究于 2017 年 5 月至 9 月在马来西亚国民大学医学中心进行。
我们招募了 300 名男女，平均年龄为 30.23（±11.04）岁，男女各 150 人，根据 BMI 分为 3 组（每组 50 人）：非肥胖组（BMI≤22.9kg/m）；肥胖组（BMI 为 23 至 34.9kg/m）；和病态肥胖组（BMI>35kg/m）。测量了 BMI 和嗓音障碍指数-10（VHI-10）。参与者发/a/、/i/和/u/音时，用秒表测量 MPT 的三次读数的平均值。使用独立样本 t 检验和方差分析比较组间和组内的均值。Spearman 相关性评估了 MPT 与 BMI 之间的相关性。
分析了两性 MPT 的正常值及其与 BMI 的相关性。
非肥胖组男性和女性的 MPT 正常值分别为 21.41（±6.85）秒和 18.05（±5.06）秒。所有 BMI 组的男性 MPT 均显著高于女性（P ≤ 0.05）。两性 MPT 与 BMI 呈低度负相关。
这项开创性的研究记录了马来西亚人的 MPT 正常值，结果表明，男性在所有 BMI 组中的 MPT 均长于女性。肥胖会影响 MPT，因为 BMI 越高，MPT 越低。
