Table 5.

Paired t test analyzing medication from postoperative days 0–14 for oral opioids,^* comparing spinal and general anesthesia for single-bundle and double-bundle operations

Operation	Group; mean ± SD		Mean difference (95% CI)†	p value
	Spinal anesthesia	General anesthesia
Double-bundle	3.1 ± 2.5	3.9 ± 2.5	0.88 (0.62 to 1.12)	< 0.001
Single-bundle	2.9 ± 2.1	2.7 ± 2.1	−0.18 (−0.43 to 0.06)	0.13

CI = confidence interval; SD = standard deviation.

^*Opioid pills included Percocet (oxycodone 5 mg + acetaminophen 325 mg), Tramacet (tramadol 37.5 mg + acetaminophen 325 mg) and Tylenol No. 3 (codeine phosphate 30 mg + caffeine 15 mg + acetaminophen 300 mg).

^†Spinal minus general anesthesia.