Abstract
Normal values for spirometric tests of pulmonary ventilatory functions in North Indian males are reported. A significant relationship is observed with age or height or both for forced vital capacity (FVC), forced expiratory volume, one second (FEV1.0), FEV1.0/FVC, %, and maximal mid-expiratory flow rate (MMF). Significant prediction formulae could not be derived for maximum voluntary ventilation (MVV) and maximal expiratory flow rate (MEFR). The reasons for these two spirometric tests being unsuitable for pulmonary function evaluation have been discussed. A comparison has been made with the values reported for the people of European descent, and the South Indian males. Indians tend to have a lower vital capacity and it is lower in South Indians than in North Indians. Ethnic variations should be taken into account when evaluating pulmonary ventilatory function tests
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