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Table 1 Important characteristics of the patient group

From: Camera-based photoplethysmography in an intraoperative setting

Characteristic Value
Age (in years) 65.2 ± 12.0
Female/ male (number) 17/24
Body mass index (in kg/m2) 26.1 ± 4.6
NYHA (number)a
 0—not examined 4
 1—no problems 35
 2—irrelevant problems 0
 3—relevant problems 2
Vascular system (number)a
 0—not examined 0
 1—no problems 20
 2—irrelevant problems 2
 3—relevant problems 19
Duration surgery (in min) 157.3 ± 99.9
Duration video recording (in min) 32.0 ± 7.2
  1. aThe categories stem from the ANDOK\(^{\mathrm {live}}\) protocol. For the NYHA (New York Heart Association) classification, they describe the relevance of assistance based on the degree of heart failure