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. Author manuscript; available in PMC: 2020 Jun 1.
Published in final edited form as: Ann Surg. 2020 Jun;271(6):1080–1086. doi: 10.1097/SLA.0000000000003109

Table 2.

Patient groups and attributes of preoperative opioid exposure.

Preoperative Exposure Group Name N % Total Dose in Pills (IQR) Duration in Months (IQR) Continuity in Months (IQR) Recency in Months (IQR)
Minimal 1 - Minimal 73761 27.6% 36 (40) 1 (0) 1 (0) 3 (6)
Intermittent 2 - Remote 12974 4.9% 129 (162) 3 (2) 2 (0) 2 (4)
3 - Recent 7423 2.8% 420 (566) 6 (3) 3 (1) 1 (2)
Chronic 4 - Low 3337 1.2% 1262 (1386) 10 (2) 7 (3) 1 (1)
5 - Medium 3960 1.5% 3028 (4705) 12 (0) 12 (0) 1 (1)
6 - High 56 0.02% 18923 (11673) 12 (1) 12 (1) 1 (1)