Fig. 4

Total Hip Arthroplasty DIPA Graph. Detroit Interventional Pain Assessment (DIPA) graph for total hip arthroplasty (THA). Medication classes are represented as A (no medication, 0 Morphine Milligram Equivalent (MME)), B (Over-the-counter medication, 0 MME), C (occasional use of short-acting narcotics, 1–30 MMEs), D (consistent use of short-acting narcotics, 31–79 MMEs), and E (long-acting narcotics). The percentage of patients in each medication class with their pain assessment (green = no pain/tolerable pain, red = intolerable pain) is displayed at three weeks, three months, and six months. Efficiency scores are represented as percentages and average daily MMEs are displayed at each postoperative period. Statistical differences in MMEs and the percentage of patients using narcotics from three weeks to three months are represented by asterisks