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. 2017 Sep 27;97(3 Suppl):65–75. doi: 10.4269/ajtmh.15-0929

Table 1.

Basic information on variables included in the Cox Proportional Hazards model

Variable Description
Matching variables
 Residence Residence of the household (urban/rural)
 Household wealth Above or below median principal component score for household assets
 Education level Mother's educational level: secondary+, primary or none
 Malaria transmission risk Malaria transmission risk based on MAP 2010 PfPR2–10, categorized as < 40% and 40%+
 DPT3 Immunization status Above or below the median PSU-level coverage of three doses of DPT in children 12–23 months of age.
Other variables controlled for in the model
 Household wealth Survey-specific quintile of household wealth based on household assets (1–5)
 Child age category In months: 1–5, 6–11, 12–23, 24–35, 36–47, 48–59
 Mother’s age category In years: 15–19, 20–24, 25–29, 30–34, 35–39, 40–44, 45–49
 Parity Number of births (continuous)
 DPT3 Immunization coverage PSU-level coverage of 3 doses of DPT in children 12–23 months of age (continuous)
 Diarrhea prevalence PSU-level diarrhea prevalence in children less than 5 years of age in the 2 weeks before survey (continuous)
 Season High transmission season (December–May) for each month of observation
 Malaria transmission risk Malaria transmission risk based on MAP 2010 PfPR2–10, categorized as < 40% and 40%+
 Rainfall (lagged 2 months) PSU-level monthly rainfall from FEWS
 Minimum temperature (lagged 2 months) PSU-level monthly minimum temperature from MODIS
 Skilled birth attendance PSU-level skilled birth attendance rate
Water source Household water source: improved or nonimproved
Malaria control intervention variable
 Monthly ITN ownership Household owns at least one ITN by month. Constructed using data on ownership of nets, type of net, treatment of net and duration of ownership (monthly up to 36 months before the survey).

FEWS = Famine Early Warning System; MAP = Malaria Atlas Project; MODIS = Moderate Resolution Imaging Spectroradiometer; PfPR2–10 = Plasmodium falciparum prevalence rate in children age 2–10 years.