Normal spirometric reference values for Omani children and adolescents

Al-Riyami, Bazdawi M.; Al-Rawas, Omar A; Hassan, Musaab

doi:10.1111/j.1440-1843.2004.00608.x

Cited by 19 publications

(24 citation statements)

References 23 publications

(62 reference statements)

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“…R 2 values found in our reference models for FEV1 and FVC (0.712À0.824) are perfectly in line with the literature, indicating that the most part of variance of these parameters was explained by predictor variables considered in this study. Finally, RSD of the models are also consistent with the literature, when logarithmic models for FVC and FEV1 have been considered (Quanjer et al 1995;Ip et al 2000;Kivastik and Kingisepp 2001;Al-Riyami et al 2004). …”

Section: Discussionsupporting

confidence: 84%

“…Standardized residual plots are also reported. The final prediction model was compared with several models available in the literature (Knudson et al 1983;Lebecque et al 1991;Rosenthal et al 1993;Quanjer et al 1995;Sirotkovic and Cvoriscec 1995;Parma et al 1996;Hankinson et al 1999;Ip et al 2000;Kivastik and Kingisepp 2001;Golshan et al 2003;Al-Riyami et al 2004;Chinn et al 2006) using median values of the difference between measured and predicted values and the difference between 5th and 95th percentiles (Tables I and II). Residual standard deviation (RSD) as goodness-of-fit test is also reported for all experimental models.…”

Section: Discussionmentioning

confidence: 99%

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Spirometric reference values for children and adolescents from Kazakhstan

Facchini

Fiori²,

Bedogni

et al. 2007

Annals of Human Biology

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Spirometric reference values for children and adolescents from Kazakhstan

Facchini

Fiori²,

Bedogni

et al. 2007

Annals of Human Biology

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“…Data on 1,256 lifelong non-smokers (51.2% males) aged 6–65 years were available [45,46]. They did not fit in any of the 4 groups that were formed, could not be combined with data from Iran, and are therefore not included in the present (Global Lungs 2012) prediction equations (OLS Table E3).…”

Section: Resultsmentioning

confidence: 99%

Multi-ethnic reference values for spirometry for the 3–95-yr age range: the global lung function 2012 equations

Quanjer¹,

Stanojevic²,

Cole³

et al. 2012

Eur Respir J

4,543

4,482

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Objective Derive continuous prediction equations and their lower limits of normal for spirometric indices, which are applicable globally. Material Over 160,000 data points from 72 centres in 33 countries were shared with the European Respiratory Society Global Lung Function Initiative. Eliminating data that could not be used (mostly missing ethnic group, some outliers) left 97,759 records of healthy nonsmokers (55.3% females) aged 2.5–95 years. Methods Lung function data were collated, and prediction equations derived using the LMS (λ, µ, σ) method, which allows simultaneous modelling of the mean (mu), the coefficient of variation (sigma) and skewness (lambda) of a distribution family. Results After discarding 23,572 records, mostly because they could not be combined with other ethnic or geographic groups, reference equations were derived for healthy individuals from 3–95 years for Caucasians (N=57,395), African Americans (N=3,545), and North (N=4,992) and South East Asians (N=8,255). FEV1 and FVC between ethnic groups differed proportionally from that in Caucasians, such that FEV1/FVC remained virtually independent of ethnic group. For individuals not represented by these four groups, or of mixed ethnic origins, a composite equation taken as the average of the above equations is provided to facilitate interpretation until a more appropriate solution is developed. Conclusion Spirometric prediction equations for the 3–95 age range are now available that include appropriate age-dependent lower limits of normal. They can be applied globally to different ethnic groups. Additional data from the Indian subcontinent, Arab, Polynesian, Latin American countries, and Africa will further improve these equations in the future.

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“…Data from healthy children and adolescents who had been studied in the Netherlands [21,22], North America (Caucasians, African-Americans and Mexican-Americans) [23], England [8,24], Germany and Austria [25], Mexico City [6], Iran [7], Oman [26], India [27], Tunisia [28], Hong Kong [29] and Australia (G.L. Hall, Respiratory Medicine, Princess Margaret Hospital, School of Paediatric and Child Health, University of Western Australia, Perth, Australia, personal communication) were collated.…”

Section: Spirometrymentioning

confidence: 99%

“…All of the studies had received ethical approval from the appropriate governing bodies, and data were collected after written informed consent had been obtained from parents and, where appropriate, the subjects themselves. With the exception of the Australian data, details regarding the selection of subjects, type of equipment used and derivation of summary statistics for FEV1 and FVC have been described previously [6][7][8][21][22][23][24][25][26][27][28][29]. All of the data were derived from children without a history of current or past respiratory disease, and all were lifelong nonsmokers.…”

Section: Spirometrymentioning

confidence: 99%

Changes in the FEV1/FVC ratio during childhood and adolescence: an intercontinental study

Quanjer

Stanojevic

Stocks

et al. 2010

European Respiratory Journal

118

114

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In children, the ratio of forced expiratory volume in 1 s (FEV1) to forced vital capacity (FVC) is reportedly constant or falls linearly with age, whereas the ratio of residual volume (RV) to total lung capacity (TLC) remains constant. This seems counter-intuitive given the changes in airway properties, body proportions, thoracic shape and respiratory muscle function that occur during growth. The age dependence of lung volumes, FEV1/FVC and RV/TLC were studied in children worldwide.Spirometric data were available for 22,412 healthy youths (51.4% male) aged 4-20 yrs from 15 centres, and RV and TLC data for 2,253 youths (56.7% male) from four centres; three sets included sitting height (SH). Data were fitted as a function of age, height and SH.In childhood, FVC outgrows TLC and FEV1, leading to falls in FEV1/FVC and RV/TLC; these trends are reversed in adolescence. Taking into account SH materially reduces differences in pulmonary function within and between ethnic groups. The highest FEV1/FVC ratios occur in those shortest for their age.When interpreting lung function test results, the changing pattern in FEV1/FVC and RV/TLC should be considered. Prediction equations for children and adolescents should take into account sex, height, age, ethnic group, and, ideally, also SH.

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Normal spirometric reference values for Omani children and adolescents

Abstract: The developed prediction equations can be used in clinical practice in Oman and can be considered for use in neighbouring Arab countries.

Cited by 19 publications

References 23 publications

Spirometric reference values for children and adolescents from Kazakhstan

Spirometric reference values for children and adolescents from Kazakhstan

Multi-ethnic reference values for spirometry for the 3–95-yr age range: the global lung function 2012 equations

Changes in the FEV1/FVC ratio during childhood and adolescence: an intercontinental study

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