Table 2.

Utilization of endoscopic surveillance in patients with Barrett’s esophagus, stratified by study site.

Variable	Overall n=235	Mayo n=79	SAVAMC n=75	UNC n=81
Years with BE (mean ± SD)	6.5 ± 5.9	5.2 ± 5.4	9.3 ± 6.2	5.2 ± 5.2
Endoscopy after BE diagnosis
Yes (n (%))	211 (92.1)	68 (87.2)	69 (94.5)	74 (94.9)
No (n (%))	18 (7.9)	10 (12.8)	4 (5.5)	4 (5.1)
Total surveillance endoscopies (mean ± SD)	4.0 ± 4.0	3.1 ± 2.8	5.3 ± 5.1	3.8 ± 3.7
Months per endoscopy (mean ± SD)	20.2 ± 16.8	20.9 ± 18.6	25.4 ± 14.2	14.3 ± 15.5
Surveillance endoscopies per 2 year period† (mean ± SD)	1.8 ± 1.7	1.5 ± 1.0	1.1 ± 0.7	2.8 ± 2.5
Surveillance endoscopies per 3 year period† (mean ± SD)	2.7 ± 2.6	2.2 ± 1.5	1.7 ± 1.0	4.2 ± 3.7
>1 endoscopic surveillance per 2 year period†‡ (n (%))	70 (44.9)	20 (37.7)	16 (29.6)	34 (69.4)
>1 endoscopic surveillance per 3 year period†‡ (n (%))	102 (65.4)	30 (56.6)	31 (57.4)	41 (83.7)

^†Patients with BE<6 months were excluded from these analyses.

^‡Discounting a single confirmatory endoscopy following BE diagnosis

Mayo: Mayo Clinic, Rochester, MN; SAVAMC: Southern Arizona VA medical Center, Tucson AZ; UNC: University of North Carolina Hospitals, Chapel Hill, NC

BE=Barrett’s esophagus

SD=standard deviation