Table 3

Total number of patients and endoscopies identified by different data sources
Data Source All Patients Patients with Endoscopy Patients without Endoscopy Total Number of Endoscopies
n (%) n (%)1 n (%)1 n (%)2
1672 (100)
Gold Standard 1443 (86) 229 (14) 1937 (100)
Chart Review 1310 (78) 362 (22) 1506 (78)
Unique3 40 (3) 205 (11)
Physician Billing 1300 (78) 372 (22) 1566 (81)
Unique3 24 (2) 152 (8)
Unique admin data4 91 (7) 125 (6)
Hospital Inpatient 326 (19) 1346 (81) 354 (18)
Unique3 9 (<1) 33 (2)
Unique admin data4 56 (4) 39 (2)
Hospital Outpatient 1021 (61) 651 (39) 1126 (58)
Unique3 4 (<1) 30 (2)
Unique admin data4 32 (2) 63 (3)
Combined Administrative 1403 (84) 269 (16) 1732 (89)
Unique3 133 (9) 431 (22)

1 Percent based on all patients included in the study (n=1443).

2 Percent based on total number of endoscopies identified in gold standard (n=1937).

3 Number (percentage) identified in one and only one data source.

4 Number (percentage) identified in one and only one of the administrative data sources, may also be identified from the chart review.

Li et al.

Li et al. BMC Health Services Research 2012 12:358   doi:10.1186/1472-6963-12-358

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