Odds ratios and 95% CI for risk of Barrett’s oesophagus (BO) associated with serum leptin concentration

Leptin category	Controls	BO cases	OR (95% CI)
Females
Q1	25	31	1.0 (Ref)
Q2	25	26	0.7 (0.3 to 1.6)
Q3	24	20	0.5 (0.2 to 1.2)
Q4	26	19	0.4 (0.1 to 1.0)
p Trend			0.07
Males
Q1	50	25	1.0 (Ref)
Q2	53	54	2.2 (1.2 to 4.0)
Q3	50	46	2.0 (1.0 to 3.8)
Q4	53	78	3.3 (1.7 to 6.6)
p Trend			<0.01