Table 1 Baseline characteristics.

From: Effect of the intravenous acetaminophen clinical pathway on postoperative analgesia in spinal fusion surgery

 

Pre-group (n = 31)

Post-group (n = 47)

P value *2

Mean (95% CI)

Mean (95% CI)

Age

68.4 (64.4–72.3)

70.4 (67.2–73.6)

0.4267

Height (cm)

158.9 (155.2–162.6 )

157.4 (154.4–160.4)

0.5243

Body weight (kg)

62.3 (57.8–66.9)

61.6 (57.9–65.3)

0.8012

Body mass index

24.5 (23.3–25.8)

24.7 (23.7–25.8)

0.8383

Operation time (min)

170.6 (155.5–185.8)

162.4 (150.1–174.7)

0.4005

Blood loss *1 (mL)

176.1 (134.1–231.3)

175.1 (140.3–218.5)

0.9751

Hb (g/dL)

13.2 (12.7–13.7)

13.7 (13.3–14.1)

0.1080

AST (U/L) *1

22.0 (20.1–24.1)

22.5 (20.9–24.2)

0.7209

ALT (U/L) *1

19.6 (17.1–22.6)

19.6 (17.5–22.0)

0.9941

Fentanyl injection (mg)

1.43 (1.32–1.53)

1.32 (1.24–1.41)

0.1255

 

Mean (%)

Mean (%)

P value*2

Inhalation anesthesia

  Desflurane

17 (54.8)

7 (14.9)

0.0003

  Sevoflurane

14 (45.2)

40 (85.1)

 

Sex

  Female

16 (51.6)

26 (55.3)

0.8184

  Male

15 (48.4)

21 (44.7)

 

ASA-PS I

7 (22.6)

12 (25.5)

1.0000

II

24 (77.4)

35 (74.5)

 

Intraoperative acetaminophen

No

3 (9.7)

0 (0)

0.0591

Yes

28 (90.3)

47 (100)

 

Surgical method

PLIF

24 (77.4)

42 (89.4)

0.2031

TLIF, MIS–TLIF

7 (22.6)

(MIS–TLIF 0)

5 (10.6)

(MIS–TLIF 2)

 
  1. *1Geometric mean average time.
  2. *2P value, Continuous variable: t–test.
  3. Category item: Fisher’s exact test.