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Table 1 Encounter Review Sample Strata and Sample Weights

From: Validation of use of billing codes for identifying telemedicine encounters in administrative data

Billing Code Criteria

Number of Encounters Available

Proportion of Available Encounters

Number of Encounters Selected

Proportion of Selected Encounters

Sample Weighta

Inpatient encounter, no modifier code

796,481

0.379

63

0.1615

2.349146

Outpatient encounter, no modifier code

1,299,521

0.619

67

0.1718

3.603393

Inpatient encounter, GT modifier

552

0.000263

65

0.1667

0.001578

Outpatient encounter, GT modifier

2076

0.000989

62

0.1590

0.006222

Inpatient encounter, GQ modifier

0

0

0

0

0

Outpatient encounter, GQ modifier

258

0.000123

132

0.3385

0.000363

  1. aSample weight = (Percent of encounters available) / (Percent of encounters selected)