Table 1.

Demographic Characteristics and Prevalence of Obstructive Sleep Apnea (OSA) and Poor Sleep Quality in Controls, GERD with no BE and BE patient groups.

Variable	Controls (n=75)	GERD (n=83)	p	BE (n=63)	p
Age (SD)*	61.7 (6.7)	59.2 (9.4)	0.06	61.8 (70)	0.91
Males (%)#	73 (97)	73 (89)	0.03	61 (97)	0.85
Caucasian (%)#	36 (48)	61 (73)	0.004	52 (83)	<0.0001
Current Smoker (%)#	20 (27)	25 (30)	0.73	21 (33)	0.01
BMI (SD)*	30.8 (6.1)	30.1 (7.0)	0.53	30.5 (5.7)	0.50
Recruitment Source: endoscopy† (%)#	14 (19)	68 (82)	<0.0001	49 (78)	<0.0001
OSA by Berlin Questionnaire (%)#	36 (48)	54 (65)	0.03	33 (52)	0.61
Pittsburgh Questionnaire Score*	5.6 (4.1)	6.9 (3.9)	0.04	5.5 (3.1)	0.80
Poor sleep quality by Pittsburgh Questionnaire (%)#	29 (39)	50 (60)	0.007	29 (46)	0.38

GERD, Gastroesophageal reflux disease; BE, Barrett’s esophagus; SD, standard deviation; BMI, body mass index; OSA, obstructive sleep apnea

^*Means among cases and controls were compared using an unpaired student’s t-test

^#Prevalence among cases (GERD and BE) and controls was compared by the chi-squared test

^†Patients recruited from subjects scheduled for elective endoscopy, as opposed to those recruited from primary care clinic