Global Journal of Medical Research, L: Nutrition & Food Science, Volume 22 Issue 2

a significant number of auto-rickshaw drivers belong to the relevant category. The formula (4) for obtaining the p-value (p1) is depicted in equation-2: 2 where, n=total number of auto-rickshaw drivers included in the study=157; X=expected number of successes=n/2=78.5 ≃ 79; p=observed proportion of success=proportion of auto- rickshaw drivers, belonging to a particular category; q=observed proportion of failure=proportion of auto- rickshaw drivers, not belonging to the relevant category. If p1<0.05, then it can be inferred that a significant number of auto-rickshaw drivers belong to the pertinent category (i.e., the null hypothesis is rejected and the alternative hypothesis is accepted); otherwise, the number of auto-rickshaw drivers, belonging to the relevant category, is not significant (i.e., the null hypothesis is accepted). If p<0.5 (and consequently, q>0.5), then the value of p1 may result in wrong inference with regard to significance. Therefore, in such a situation (where p<0.5 and q>0.5), p and q are both taken as approximately (since n is an odd number) equal to 0.5, only for the sake of calculating p1. Fig.-1: Flowchart Depicting the Study Protocol 40 Year 2022 Global Journal of Medical Research Volume XXII Issue II Version I ( D ) L © 2022 Global Journals Assessment of Body Mass Index (BMI) and General Health Status of Male Auto-Rickshaw Drivers in Garia, Kolkata p1 = 2 n! (n−X)! X! p X q (n−X) p=prevalence of malnutrition among adult Indian males=28.6%; q=(100-p)=71.4%; After calculation, one will get s=78.41. Considering a design effect of 2, the final sample size becomes 78.41 X 2=156.82 ≃ 157. The sample (of size=157) has been collected on the basis of simple random sampling, from 1128 male auto-rickshaw drivers (belonging to the age-group of 18-55 years), associated with the Garia Southern Avenue auto-rickshaw stand. A pre-designed and pre-tested questionnaire has been used to collect the relevant information from the auto-rickshaw drivers through interview (the questionnaire has been validated by pre-testing it among a few auto-rickshaw drivers belonging to the sample). Besides, the drivers have been subjected to thorough clinical examination. Subsequently, the collected data have been tabulated, the binomial tests have been performed (at 5% level of significance) on them, and the results of the tests have been interpreted. Binomial test is applied when an experiment has two possible outcomes viz., success and failure, and the probability of success is known. A binomial test is conducted to find out whether the observed result differs significantly from the expected one. Here, the null hypothesis is that a significant number of auto-rickshaw drivers do not belong to the pertinent category, and the alternative hypothesis is that The method employed in this work, is shown in fig.-1. d=absolute error=10%.