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Validation of Bahasa Malaysia STOP-BANG questionnaire for identification of obstructive sleep apnea

Abdullah B, Idris AI, Mohammad ZW, Mohamad H

Sleep Breath, 2018 Dec;22(4):1235-1239.
PMID: 29682698 DOI: 10.1007/s11325-018-1663-1

PURPOSE: The diagnosis of obstructive sleep apnea (OSA) by polysomnography (PSG) is time-consuming and expensive. The STOP-BANG questionnaire (SBQ) is an adequate screening tool and easily applied. We aimed to validate the Bahasa Malaysia version for use in sleep clinic.
METHODS: A cross-sectional study was carried out in the sleep clinic. Standard forward-backward method was used for translation. Patients were required to answer a translated version of the questionnaire in Bahasa Malaysia and underwent a PSG study. Apnea-hypopnea index (AHI) of five and more was considered diagnostic. SBQ score was divided into two groups, less than 3 and 3 or more to determine its correlation with mild, moderate, or severe OSA. The reliability of the questionnaire was compared against that of the PSG result.
RESULTS: We recruited 134 patients with mean age of 41.22 ± 12.66 years old. 9.7% patients have low risk, 48.5% moderate risk, and 41.8% high risk of OSA by SBQ scoring. 28.4% of patients had mild, 33.6% had moderate, and 38.0% had severe OSA by PSG. The Bahasa Malaysia version had sensitivity, specificity, and positive and negative predictive value of 61.42, 71.05, and 84.06 and 41.54% respectively. When the score is higher, the probability increases for patients to have moderate or severe OSA. SBQ score showed moderate value of agreement to AHI.
CONCLUSIONS: The Bahasa Malaysia version of SBQ is a valid tool for the identification of OSA. It is useful to detect patients at risk for further investigation and management.
Congenital Tuberculosis With Oropharyngeal Mass Presenting as Neonatal Stridor

Lim CC, Ezulia T, Bong QY, Bin Sawali H, Idris AI

JAMA Otolaryngol Head Neck Surg, 2019 Sep 01;145(9):869-871.
PMID: 31294772 DOI: 10.1001/jamaoto.2019.1708
Fulltext Decolorization of Palm Oil Mill Effluent by Klebsiella Pneumonia ABZ11: Remediation Efficacy and Statistical Optimization of Treatment Conditions

Abdulsalam M, Man HC, Abidin ZZ, Yunos KF, Idris AI

Front Microbiol, 2020;11:675.
PMID: 32477278 DOI: 10.3389/fmicb.2020.00675

Colorants contained in palm oil mill effluent (POME) are recalcitrant and carcinogenic in nature. The commonly applied ponding treatment methods have been reported inefficient for remediating the concentration of the colorants before discharge. The need for sustainable and efficient treatment technique is crucial in order to preserve the environment. In this view, this study reported the first attempt to decolorize POME using a proliferate Klebsiella Pneumonia ABZ11 at varied inoculum sizes of 5-25% (v/v), initial color concentration (650-2,600 ADMI) and treatment time of 5-40 h. The treatment conditions were optimized using Response Surface Methodology. At optimal conditions of 20% (v/v) inoculum size, initial-color concentration of 2,600 ADMI, initial pH of 7 and 35 h treatment retention time, over 80.40% color removal was achieved with insignificant disparity compared with the model predicted value of 81.538%. Also, the Monod model excellently described the decolorization kinetic process with 0.9214 coefficient of correlation (R2), and the calculated maximum growth μ
max
) and half-saturation constant (K
s
) were 7.023 d-1 and 340.569 ADMI d-1, respectively. This study revealed that the Klebsiella Pneumonia ABZ11 was highly prolific and such feature may favor a synergistic biodegradation process.
Fulltext Synthesis of Nano-Magnetite from Industrial Mill Chips for the Application of Boron Removal: Characterization and Adsorption Efficacy

Abba MU, Che Man H, Syahidah Azis R, Idris AI, Hazwan Hamzah M, Abdulsalam M

Int J Environ Res Public Health, 2021 Feb 03;18(4).
PMID: 33546264 DOI: 10.3390/ijerph18041400

The present study synthesized nano-magnetite (Fe3O4) from milled steel chips using the high energy ball milling (HEBM) method, characterized it, and then utilized it as a sorbent to remediate boron concentration at various pH (4-9), dosages (0.1-0.5 g), contact times (20-240 min), and initial concentrations (10-100 mg/L). The nano-sorbents were characterized based on SEM structure, elemental composition (EDX), surface area analysis (BET), crystallinity (XRD), and functional group analysis (FTIR). The highest adsorption capacity of 8.44 mg/g with removal efficiency of 84% was attained at pH 8, 0.5 g dosage, contact time of 180 min, and 50 mg/L initial concentration. The experimental data fit best with the pseudo-second-order kinetic model with R2 of 0.998, while the Freundlich adsorption isotherm describes the adsorption process with an R2 value of 0.9464. A regeneration efficiency of 47% was attained even after five cycles of reusability studies. This efficiency implies that the nano-magnetite has the potential for sustainable industrial application.