Spirometric reference values for healthy nonsmoking <scp>S</scp>audi adults

Ghobain, Mohammed O Al; Alhamad, Esam H.; Alorainy, Hassan S; Hazmi, Manal Al; Moamary, Mohamed S Al; Al-Hajjaj, Mohamed S.; Idress, Majdy; Al-Jahdali, Hamdan; Zeitouni, Mohammed

doi:10.1111/crj.12038

Cited by 11 publications

(8 citation statements)

References 13 publications

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“…This result was also in line with the previous studies Percent predicted mean FVC and FEV of male respondents were higher than females. The fi nding was similar to previously published articles as mean personal percent predicted pulmonary functions tests were higher than females [20][21][22][23]. Pulmonary function test parameters, FVC, FEV, and PEFR, among chewer, were found to be higher than nonchewers.…”

Section: Discussionsupporting

confidence: 90%

Prevalence of Asthma and Its Association with Daily Habits in Jimma Town, Ethiopia

Ayana¹

2018

Open J Asthma

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Background: Many studies showed a low risk of asthma in sub-Saharan countries. However, due to indoor pollutions and environmental hazards, developing countries are always the prior victims of all types of respiratory illnesses including asthma. Jimma, southwestern Ethiopia, is known by its wide range of vegetations including khat and coffee. Together with high plantation of those cash crops, there is widespread consumption of them by the locals. Objective: To investigate prevalence and severity of bronchial asthma and its association with daily habits in Jimma town, Ethiopia Methods and Materials: A community-based cross-sectional study was conducted in Jimma town on 1300 participants. Systematic random sampling technique was employed to select households. Semistructured questionnaire and pulmonary function tests were used to collect data. SPSS was used to execute simple descriptive, independent t-tests and chi-square. Results: Chewer participants had higher pulmonary function tests. Khat might indeed have bronchodilating effect when chewed before the measurement. Except for FVC; the other pulmonary function test parameters were higher among coffee consumers. The bronchodilating effect of caffeine may increase pulmonary function parameters. In the current study, the prevalence of asthma in Jimma town was 4.9%. A signifi cantly large proportion of asthmatic smokers had asthmatic symptoms in once or more than once per week [χ2-20.208, p-0.00]. Conclusion and clinical Relevance: Bronchial asthma is public health burdon in Jimma town. FVC, FEV and PEFR functional parameters were lower in asthmatic patients when compared to nonasthmatic participants that may indicates the severity of asthma in the study area. Lung functions, onset, severity & asthma managements could be affected by the daily consumption of khat, coffee, and cigarette.

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Section: Discussionsupporting

confidence: 90%

Prevalence of Asthma and Its Association with Daily Habits in Jimma Town, Ethiopia

Ayana¹

2018

Open J Asthma

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“…The evaluation of the regional equations indicated that Al Ghobain et al's equation, which was formulated based on Saudi Arabian population, 13 was the most suitable for our sample in males as compared to other regional equations studied including Sliman et al's equation using Jordanian population. 28 This number is lower than 150 males and 150 females set by ERS as the lowest sample size necessary to validate reference values to avoid spurious differences due to sampling errors.…”

Section: Comparison With Other Regional Reference Equationsmentioning

confidence: 86%

“…Predicted normal values were calculated for each participant using different reference equations including the GLI 2012 Caucasian equation, GLI 2012 other or mixed ethnicity equation, 5 the Omani equation formulated by Al-Rawas et al, 12 the Saudi Arabian equation formulated by Al Ghobain et al 13 and a Jordanian equation that was published in 1981 by Sliman et al 14 z-scores for FEV1, FVC and FEV1/FVC for each participant were produced using the different reference equations studied, as done in a previous study. 15 Normal distribution assumption of the z-scores for each equation was evaluated by examining the Q-Q plots, evaluation of skewness and kurtosis and performing Kolmogorov-Smirnov test.…”

Section: Discussionmentioning

confidence: 99%

Do the global lung function initiative reference equations reflect a sample of adult Middle Eastern population?

Al‐Qerem

Hammad

AlQirem

et al. 2019

Clinical Respiratory J

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Introduction The global lung function initiative (GLI) 2012 introduced new multi‐ethnic spirometry reference values for numerous ethnicities. Objectives The aim of this study was to investigate the suitability of the GLI reference values for the adult Jordanian population. Methods About 1875 (1029 females and 846 males) healthy non‐smoking adults were enrolled from several locations in Jordan. Spirometry tests were performed. z‐scores and predicted normal values were calculated for each participant using GLI 2012 equations in addition to other local equations from the Middle East. Results Our results indicated that none of the GLI 2012 or other regional equations studied produced an acceptable fit to our data. Conclusion A need to formulate a specific equation for the Jordanian population is urgently required to better evaluate their respiratory conditions.

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“…In a study in which smokers were invited to switch to an e-cigarette and abstain from smoking, the FEF 25-75% increased significantly (p ¼ 0.034) from 85.7% to 100.8% predicted over 52 weeks (Cibella et al 2016). There are, however, several reasons why the FEF 25-75% may not be useful: it is dependent upon the FVC, it lacks the repeatability of FEV 1 , it has a wide normal range (Quanjer et al 2012b, Al Ghobain et al 2014, Balasubramaniam et al 2014, Gutierrez et al 2014, Rufino et al 2017 and it is reduced in the presence of proximal airway narrowing (Johns et al 2014). These drawbacks severely limit the use of FEF 25-75% for diagnostic purposes, but might not preclude its use in aetiological studies where differences between groups may be valuable.…”

Section: Search Numbermentioning

confidence: 99%

Review of biomarkers to assess the effects of switching from cigarettes to modified risk tobacco products

Peck

Sanders²,

Scherer

et al. 2018

Biomarkers

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Spirometric reference values for healthy nonsmoking Saudi adults

Abstract: The reference spirometric values derived in our study were significantly lower than the predicted values derived by the American equations.

Cited by 11 publications

References 13 publications

Prevalence of Asthma and Its Association with Daily Habits in Jimma Town, Ethiopia

Prevalence of Asthma and Its Association with Daily Habits in Jimma Town, Ethiopia

Do the global lung function initiative reference equations reflect a sample of adult Middle Eastern population?

Review of biomarkers to assess the effects of switching from cigarettes to modified risk tobacco products

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