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Table 1 Formulas of the analysis

From: The burden of chronic mercury intoxication in artisanal small-scale gold mining in Zimbabwe: data availability and preliminary estimates

Formula 1 - Disease point prevalence in the sample (%) P i = D i /E i *100
  P = Prevalence (in %) of the disease in the sample
  D = Number of diseased cases in the sample
  E = Number of individuals in the sample
  i = Age and sex group category i
Formula 2 - Exposure point prevalence in the total population (%) EP i = X i /T i *100
  EPi = Prevalence (in %) of the exposure in the total population
  Xi = Number of exposed individuals in the total population
  Ti = Total population
  i = Age and sex group category i
Formula 3 - Disease point prevalence in the total population (%) P 2 = X i /100*P i
  P2 = Prevalence (in %) of the disease in the total population
  X = Number of exposed individuals in the total population
  P = Prevalence (in %) of the disease in the sample
  i = Age and sex group category i
Formula 4 - Disability-adjusted life years (DALYs) DALY i = YLL i (a i *b i *c i ) + YLD i (d i *e i )
  DALY = Disability-adjusted life years
  YLD = Years lived with disability
  a = Number of incident cases
  b = Disability weight
  c = Average duration of disability
  YLL = Years of life lost due to premature mortality
  d = Number of deaths
  e = Standard life expectancy at the age of death
  i = Age and sex group category i
Formula 5 - Disability-adjusted life years (DALYs) per 1,000 population DALYr i = DALY i /T i *1,000
  DALYr = DALYs per 1,000 population
  DALY = Number of total DALYs
  T = Total population
  i = Age and sex group category i