Table 1. General characteristics of the sample by study participation.
| Characteristic | Participants | Non Participants | p-value* |
|---|---|---|---|
| Demographics | |||
| Number of children | 5240 | 1416 | |
| Age in years Mean (SD) | 4·9 (2·5) | 5·1 (2·5) | 0·009 |
| % Female | 50·2 | 46·8 | 0·025 |
| Household | |||
| % No formal education of head of household | 38·8 | 44·0 | 0·001 |
| % More than 30 minutes from water source | 55·2 | 59·5 | 0·008 |
| % Roof made of mud/wood | 11·6 | 12·2 | 0·60 |
| % Has a latrine | 78·6 | 77·5 | 0·35 |
| Cooking Fire Location and Ventilation | |||
| % Outside open air | 1·6 | 1·9 | 0·002 |
| % In a room with ventilation | 39·4 | 43·7 | |
| % In a room without ventilation | 59·0 | 54·3 | |
| Exposure to cooking fire | |||
| % Child present in the room while cooking during the day | 43·0 | 38·9 | 0·053 |
| Child sleeps in a room | |||
| % Without a cooking fire and ventilated | 50·3 | 48·7 | 0·41 |
| % Without a cooking fire and not ventilated | 46·8 | 48·3 | |
| % With a cooking fire | 2·9 | 2·9 |
* From a logistic model adjusting for age or a two sample t-test as appropriate