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Year : 1999  |  Volume : 2  |  Issue : 1  |  Page : 39-44

A new formula for predicting p,,eak expiratory flow rate in adult Nigerians

1 Department of Medicine, College of Health Sciences, Usmanu Danfodiyo UniV ersity, Sokoto, Nigeria
2 Department of Medicine, University of Port Harcourt Teaching Hospital, Port Harcourt, Nigeria

Correspondence Address:
C H Njoku
Department of Medicine, College of Health Sciences, Usmanu Danfodiyo UniV ersity, Sokoto
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Values of peak expiratory flow rate (PEF) in 1009 normal adult Nigerians, made up of 668 males and 341 females between the ages of 15 and 82 years, living and/or working in Port harcourt and its environs were obtained. Pearson's correlation coefficient between PEF and age as well as other anthropometric measurements were calculated in both male and female subjects. Multiple regression analyses were done to obtain the best prediction formulae using the measured variables in both male and female subjects. Furthermore, graphs were plotted to show the variation of PEF with age in male and female subjects with specific heights. Data for plotting the graphs were generated using the prediction formula generated from this study and other prediction formulae generated from previous studies among Nigerians and Caucasians, whose best prediction formulae incorporated height and age. The graphs illustrate the limitations of applying formulae derived from a different race and/or generation to an entirely different people with dissimilar characteristics: This lends credence to the need to make use of recent locally generated formulae for local predictions.

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