Skip to main content

Table 5 Results of Final Step of Algorithm (Determining if a surgical case represents one of the four procedure/indication combinations of interest, with the condition as the primary indication for surgery)

From: Validation of an electronic coding algorithm to identify the primary indication of orthopedic surgeries from administrative data

Procedure/Primary Indication Sensitivity (95% Confidence Interval) Specificity (95% Confidence Interval)
Lumbar Spinal Surgery/Lumbar Herniated Disc 0.70 (0.56, 0.82) 0.96 (0.94, 0.98)
Lumbar Spinal Surgery/Lumbar Spinal Stenosis 0.76 (0.68, 0.83) 0.94 (0.91, 0.97)
Knee Arthroplasty/Knee Osteoarthritis 0.92 (0.86, 0.96) 0.99 (0.98, 1.00)
Hip Arthroplasty/Hip Osteoarthritis 0.84 (0.76, 0.90) 0.99 (0.98, 1.00)
  1. Note: “Exact” Clopper-Pearson Confidence Intervals are used