Table 1

Distribution of demographic variables by body mass index (BMI) categories

BMI category	n % (95% CI)	Age		Sex		Education		Smoking†		Alcohol/week
		⩽54*	>54*	Female*	Male*	Low*	High*	No*	Yes*	⩽100 g*	>100 g*
		n %	n %	Female*	Male*	Low*	High*	No*	Yes*	⩽100 g*	>100 g*
*Prevalence and 95% confidence interval (CI)/column.
†Current smokers at the time of endoscopy.
Underweight	8	4	4	6	2	5	3	6	2	8	0
(<18.5)	0.8	0.8	0.8	1.2	0.4	0.9	0.7	0.7	1.1	0.9
	(0.3–1.4)	(0.0–1.6)	(0.0–1.6)	(0.3–2.1)	(0.0–1.0)	(0.1–1.7)	(0.0–1.5)	(0.1–1.3)	(0.0–2.6)	(0.3–1.5)
Normal weight	365	200	165	213	152	177	183	280	85	331	34
(⩾18.5–<25)	36.8	41.1	32.7	41.9	31.5	31.2	45.0	34.8	45.7	37.5	31.2
	(33.8–39.8)	(36.7–45.5)	(28.6–36.8)	(37.6–46.2)	(27.4–35.6)	(27.4–35.0)	(40.2–49.8)	(31.5–38.1)	(38.5–52.9)	(34.3–40.7)	(22.5–39.9)
Overweight	456	211	245	197	259	281	166	384	72	399	57
(⩾25–<30)	46.0	43.3	48.6	38.8	53.6	49.5	40.9	47.7	38.7	45.2	52.3
	(42.9–49.1)	(38.9–47.7)	(44.2–53.0)	(34.6–43.0)	(49.2–58.0)	(45.4–53.6)	(36.1–45.7)	(44.2–51.2)	(31.7–45.7)	(41.9–48.5)	(42.9–61.7)
Obese	162	72	90	92	70	105	55	135	27	144	18
(⩾30)	16.3	14.9	17.9	18.1	14.6	18.5	13.5	16.8	14.5	16.3	16.5
	(14.0–18.7)	(11.7–18.1)	(14.6–21.2)	(14.8–21.4)	(11.5–17.7)	(14.9–21.3)	(10.2–16.8)	(14.2–19.4)	(9.4–19.6)	(13.9–18.7)	(9.5–23.5)
Total	991	487	504	508	483	568	407	805	186	882	109