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Table 1 MME Conversion and Opioid Usage Frequency. Factors commonly used to convert opioid doses into morphine milligram equivalents (MME) [18] were used in the study. Preoperative prescription frequency describes the percent of total preoperative opioid prescriptions. Post discharge prescription frequency describes the percent of total discharge prescriptions for each specific drug in this study

From: Frailty status as a potential factor in increased postoperative opioid use in older adults

Prescription Opioid

Conversion Factor to MME [18]

Preoperative Prescription Frequency (%)

(n = 41)

Post discharge Prescription Frequency (%)

(n = 87)

Codeine

0.15

2.4

0

Hydrocodonea

1

12.2

2.1

Hydromorphone

4

7.3

16.1

Methadone

4

4.9

1.1

Morphine

1

9.8

1.1

Oxycodoneb

1.5

41.5

79.3

Oxymorphone

3

0

0

Tramadol

0.1

17.1

1.1

  1. aHydrocodone includes all hydrocodone and Vicodin prescriptions
  2. bOxycodone includes all oxycodone and Percocet prescriptions