Association between sugar cane burning and acute respiratory illness on the island of Maui

Table 3 Trend analysis by acres burned

	Cases within area of smoke exposure	Cases outside area of smoke exposure	OR (95 % CI)	P-value compared with matched controls
Quartile 1: 108–163 acres
Burn day	20	111	2.4 (1.2, 4.8)	0.02
Non-burn day	15	196	2.4 (1.2, 4.8)	0.02
Quartile 2: 91.1–107 acres
Burn day	19	114	1.07 (0.6, 2.1)	0.87
Non-burn day	24	156	1.07 (0.6, 2.1)	0.87
Quartile 3: 76–91 acres
Burn day	32	133	0.86 (0.5, 1.5)	0.67
Non-burn day	31	111	0.86 (0.5, 1.5)	0.67
Quartile 4: 69.7–75 acres
Burn day	6	141	0.74 (0.3, 2.2)	0.79
Non-burn day	8	139	0.74 (0.3, 2.2)	0.79

ISSN: 1476-069X