Analgesic score Pain intensity
NO Pain (0) Mild Pain (1) Moderate Pain (2) Severe Pain (3)
No analgesics (0) 0 - 1 - 2 -3
Non opioid (1) 1 0 - 1 - 2
Weak opioid  (2) 2 1 0 - 1
Strong opioid (3) 3 2 1 0
Table 2: Pain Management Index (PMI) [9].