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Table 1 Minimum sample size required for estimating demographic variables and priority health conditions

From: Health issues in a Bangalore slum: findings from a household survey using a mobile screening toolkit in Devarajeevanahalli

Parameter to be estimated Sampling unit Prevalence in other studies Estimated minimum sample size
n = [Np(1-p)]/ [(d2/Z21-α/2*(N-1) + p*(1-p)] [10]
Values used for sample size calculation
Hypertension among adults Adults 30 years or above 42% [11] 259 Population size 50,000, p: 42%, d: 6%, Confidence level 95%
Diabetes among adults Adults 30 years or above 12% [12]. 113 Population size 50,000, p: 12%, d: 6%, Confidence level 95%
Anaemia in women Females 12 years and above 53% [13] 265 Population size 50,000, p: 53%, d: 6%, Confidence level 95%
Malnutrition in under 5 children Children less than 5 years 50% [14] 248 Population size 5000, p: 50%, d: 6%, Confidence level 95%
Demographic parameters Household 50% (to get the maximum sample size) [7] 261 Total number of households: 11000, p: 50%, d: 6%, Confidence level 95%