Baseline characteristics of N = 310 children 1 to 23 months of age with pneumonia and N = 133 matched control children in Gaborone, Botswana, April 2012 to August 2014.

URI, upper respiratory infection; NA, not analyzed; WHO, World Health OrganizationaControls were matched to cases 1:1 by primary care clinic and date (≤2 weeks from the case enrollment).b5 children were enrolled as case subjects twice and one child was enrolled as a case subject on three occasions.cDefined as presence of rhinorrhea, nasal congestion, or cough.dWald χ2, P-values; generalized estimating equations were used to account for correlated data among children enrolled more than once as case subjects.eWeight-for-length Baseline characteristics of N = 310 children 1 to 23 months of age with pneumonia and N = 133 matched control children in Gaborone, Botswana, April 2012 to August 2014.