Figure 2.

Time to first event of: (A) Physician-diagnosed pneumonia; (B) physician-diagnosed severe pneumonia; (C) combined physician-diagnosed and fieldworker-diagnosed pneumonia; and (D) combined physician-diagnosed and fieldworker-diagnosed pneumonia by control, improved biomass or liquefied petroleum gas (LPG) cookstove study arm. Cox proportional-hazard models adjusting for asset index, month of delivery, child sex and child age demonstrated no difference in groups regardless of pneumonia outcome considered.