. Author manuscript; available in PMC: 2015 Nov 1.

Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2014 Aug 8;23(11):2393–2403. doi: 10.1158/1055-9965.EPI-14-0384

Table 1.

Baseline characteristics of all participants, males and females in the Seattle Barrett’s Esophagus Study (SBES) cohort (n = 411)

Variable	All participants (n = 411)		Males (n = 334)		Females (n = 77)

	N	% or Median(IQR)	N	% or Median(IQR)	N	% or Median(IQR)
Age^a (yrs)
30–44.9	30	7.3	25	7.5	5	6.5
45–54.9	97	23.6	83	24.9	14	18.2
55–64.9	110	26.8	84	25.2	26	33.8
65–74.9	114	27.7	93	27.8	21	27.3
≥ 75	60	14.6	49	14.7	11	14.3
Race^a
White	397	96.6	324	97.0	73	94.8
Non-white	14	3.4	10	3.0	4	5.2
BMI^a (kg/m²)
≤ 25	56	13.6	41	12.3	15	19.5
25.1–≤ 30	194	47.2	167	50.0	27	35.1
30.1 – ≤ 35	125	30.4	102	30.5	23	29.9
>35	36	8.8	24	7.2	12	15.6
Cigarette smoking^a,^c
Current	40	9.7	28	8.4	12	15.6
Former	223	54.3	192	57.5	31	40.3
Never	148	36.0	114	34.1	34	44.1
NSAID use^a,^d
Current	169	41.1	145	43.4	24	31.2
Former	79	19.2	58	17.4	21	27.3
Never	162	39.4	130	38.9	32	41.6
Waist-hip ratio^b,^e	409	0.95(0.91–0.99)	332	0.96 (0.93–1.00)	77	0.87(0.81–0.91)

Frequency (%) of categorical variables

Median (Interquartile range) for continuous variables

Cigarette smoking was based on whether participants smoked 1 cigarette/day for 6 months or longer currently or in the past or never.

NSAID use was defined as having taken NSAID at least once a week for six months or longer, NSAID use history for one male participant was missing.

Two male participants had missing information on waist-hip ratio.

N = Number, BMI = Body mass index, NSAID = Non-steroidal anti-inflammatory drugs