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Table 3 Calculation of monthly patient cohorts

From: Impact of radiofrequency ablation for patients with varicose veins on the budget of the German statutory health insurance system

 

Annual inpatient surgeries OPS 5-385*

Annual inpatient surgeries of SHI patients

Annual outpatient surgeries of SHI patients

Annual total surgeries of SHI patients

Annual total initial surgeries of SHI patients

Annual total initial surgeries + UGFS of SHI patients

Monthly total initial surgeries + UGFS of SHI patients

2009

147,445

125,328

187,992

313,321

250,657

263,849

21,987

2010

146,279

124,337

186,506

310,843

248,674

261,762

21,814

2011

146,351

124,398

186,598

310,996

248,797

261,891

21,824

2012-2017

146,0001

124,100

186,150

310,250

248,200

261,263

21,772

Calculation

I

II = I • 0.85 (85% of patients in SHI)2

III = II • 1.5 (outpatient/inpatient ratio)3

IV = II + III (inpatient + outpatient)

V = IV • 0.8 (initial procedures account for 80% of total procedures)4

VI = V • 1/0.95 (surgeries account for 95% of all non-top-up treatments)5

VII = VI • 1/12

  1. 1 Assumption.
  2. 2 German Federal Statistical Office [48].
  3. 3 Expert opinion.
  4. 4 [4953].
  5. 5 Calculated based on Göckeritz [17], NICE [44] and expert opinion.
  6. * The annual inpatient surgeries do not reflect the number of treated patients per year but the number of inpatient reimbursed procedures. The annual number of patients treated in an inpatient setting is lower [54].