Table 11. Effect of intrathecal administration of morphine on persistent pain at 3 months following delivery among patients who had spinal anesthesia only.
Variables | Morphine | p value | ||
---|---|---|---|---|
(–) | (+) | |||
Persistent pain (+) | No. (%) | 7 (58.3) | 50 (26.9) | 0.0416 |
Total | No. | 12 | 186 | |
Dose of intrathecal Bupivacaine (ug/kg) | Mean (SD) | 199 (32) | 195 (26) | 0.442 |
Fentanyl (ng/mL) | Mean (SD) | 166 (27) | 162 (22) | 0.442 |
Morphine (ng/mL) | Mean (SD) | 0 | 1624 (216) | <0.0001 |