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Table 1 Four model scenarios with examples

From: Sampling strategies to measure the prevalence of common recurrent infections in longitudinal studies

  Short episode duration Long episode duration
Low incidence Model scenario 1 (LS) Model scenario 2 (LL)
  Annual incidence: 0.9/person-year Annual incidence: 0.9/person-year
  Mean Episode duration: 2.7 days Mean Episode duration: 5.6 days
  Examples: Examples:
  -Diarrhea or fever in low risk child population (e.g. Thailand [27]) -ALRI in malnourished child populations (Ghana[14], Brazil 2[10])
   -Diarrhoea in an population with a very heterogeneous risk (e.g. Guatemala [13])
High incidence Model scenario 3 (HS) Model scenario 4 (HL)
  Annual incidence: 7.0/person-year Annual incidence: 7.0/person-year
  Mean Episode duration: 2.7 days Mean Episode duration: 5.6 days
  Examples: Examples:
  -Diarrhoea or fever in high risk child populations, like Brazil[10], Peru[28] -Diarrhoea in very poor settings in undernourished children, e.g. Ghana[14]
   -Mild ARI in high risk population (Ghana, Brazil 2[10,14])