Clinical outcomes and prediction nomogram model for postoperative hemoglobin < 80 g/L in patients following primary lumbar interbody fusion surgery

Table 2 Univariate analysis of postoperative Hb of < 80 g/L after primary lumbar interbody fusion

Variables	Hb < 80 g/L (n = 83)	Hb ≥ 80 g/L (n = 643)	t/z/x²	P
Age (years)	61.14 ± 10.61	54.97 ± 12.04	− 4.46	0.00
Sex			31.93	0.00
Male	12	303
Female	71	340
BMI	21.69 ± 3.19	23.75 ± 3.73	0.07	0.00
Comorbidities
Hypertension	12/71	116/527	0.65	0.42
Hyperlipidemia	10/73	120/523	2.19	0.14
Respiratory diseases	6/77	22/621	2.87	0.09
Diabetes	7/76	40/603	0.60	0.44
Preoperative laboratory tests
Hb	113.96 ± 15.57	134.57 ± 15.45	11.43	0.00
PLT	204.00 ± 61.72	226.36 ± 60.29	3.17	0.00
PT	10.86 ± 0.85	10.79 ± 0.80	− 0.71	0.48
APTT	26.81 ± 3.82	26.42 ± 3.43	− 0.97	0.33
TT	18.66 ± 2.04	18.31 ± 1.67	− 1.75	0.08
FIB	2.66 ± 0.70	2.71 ± 0.77	0.46	0.65
Operative type			7.76	0.01
PLIF	67	421
TLIF	16	222
ASA			9.54	0.00
≤ 2	198	445
≥ 3	12	71
Fusion segment			118.88	0.00
1	25	468
2	41	170
≥ 3	17	5
Operation time (min)	218.61 ± 64.93	166.67 ± 42.46	− 9.77	0.00
Intraoperative blood loss (mL)	634.82 ± 370.46	323.75 ± 190.75	− 12.20	0.00
Intraoperative blood salvage	25/58	120/523	6.04	0.01

Hb hemoglobin, BMI body mass index, PLT platelet, PT prothrombin time, APTT activated partial thromboplastin time, TT thrombin time, FIB fibrinogen, PLIF posterior lumbar interbody fusion, TLIF transforaminal lumbar interbody fusion, ASA American Society of Anesthesiologist class

ISSN: 1749-799X