Effects of a liquefied petroleum gas stove intervention on pollutant exposure and adult cardiopulmonary outcomes (CHAP): study protocol for a randomized controlled trial

Table 1 Number of participants needed in each arm for primary outcomes

Outcome of interest	Effect size	Standard deviation	Sample size (power 90%)	Sample size (power 80%)
Blood pressure	5 mmHg	10	85	63
Peak expiratory flow	20 L/min/m²	40	85	63
St. George’s Respiratory Questionnaire (score)	10	20	85	63

ISSN: 1745-6215