Table 4 Morphine consumption, MME consumption, additional analgesic use, and side effects during the postoperative 24 h

Morphine Consumption via PCA (mg)^β

12.0 (8.0–23.0)

10.0 (6.00–13.0)

0.113

MME consumption (mg)^β

13.5 (8.00-25.7)

10.5 (6.00–15.0)

0,055

Additional Analgesic Use n (%)^δ

11 (36.7%)

5 (16.7%)

0.080

Nausea n (%)^δ

2 (6.66%)

1 (3.33%)

0.999

Vomiting n (%)

-

-

-

Allergic reactions n (%)

-

-

-

Respiratory depression n (%)

-

-

-

Hypotension n (%)

-

-

-

Urinary retention n (%)

-

-

-

Itching n (%)

-

-

-