Development of a Nomogram to Predict Postoperative Transfusion in the Elderly After Intramedullary Nail Fixation of Femoral Intertrochanteric Fractures

Figures & data

Table 1 Comparison of Baseline Characteristics of Two Groups

Characteristics	Non-Transfused Patients	Transfused Patients	p value
Number of patients	73	46
Sex (Male/Female)	27/46	8/36	0.022
Age (Years)	75.96 ± 5.48	78.33 ± 8.83	0.074
BMI (Kg/m^2)	20.58 ± 1.72	21.18 ± 3.52	0.401
Injury mechanism			0.653
Low-energy injury	64	39
High-energy injury	9	7
Hypertension	31	23	0.421
Diabetes	15	12	0.482
Anticoagulant history	3	13	<0.001
Preoperative Hb (g/L)	121.40 ± 13.49	108.00 ± 16.92	<0.001
Time to definitive management	2.79 ± 1.09	3.74 ± 1.20	<0.001
ASA score			<0.001
II	60	16
III	13	30
Type of anesthesia			0.013
GA	23	25
SA	50	21
Surgical duration	85.88 ± 8.35	87.91 ± 9.34	0.218
IBL (mL)	222.60 ± 54.03	273.91 ± 68.91	<0.001
Reamed			0.854
Yes	48	31
No	25	15
TV (u)	0	2.05 ± 0.75	-
Postoperative hospital stay	3.90 ± 0.93	5.20 ± 1.95	<0.001
Superficial infection	1	5	<0.001
Hospitalization expenses (RMB)	31,560.07 ± 2543.86	35,325.37 ± 4969.48	<0.001

Abbreviations: BMI, body mass index; ASA score, American Society of Anesthesiologists score; GA, general anesthesia; SA, spinal anesthesia; IBL, intraoperative blood loss; TV, transfusion volume.

Table 2 Univariate Analysis Results Related to Blood Transfusion

Characteristics	Correlation Coefficient	p value
Sex	−0.209	0.022
Age	0.165	0.074
BMI	0.081	0.397
Injury mechanism	0.041	0.656
Hypertension	0.074	0.426
Diabetes	0.064	0.487
Anticoagulant history	0.345	<0.001
Preoperative Hb	−0.296	<0.001
Time to definitive management	0.378	<0.001
ASA score	0.481	<0.001
Type of anesthesia	−0.227	0.013
Surgical duration	0.114	0.218
IBL	0.386	<0.001
Reamed	0.017	0.855

Notes: Italic and bold formats indicate that P<0.05.

Abbreviations: BMI, body mass index; ASA score, American Society of Anesthesiologists score; IBL, intraoperative blood loss.

Table 3 Multivariate Analysis Results Related to Blood Transfusion

Characteristics	OR (95% CI)	p value
Sex	0.149 (0.027, 0.832)	0.030
Anticoagulant history	3.559 (0.619, 20.463)	0.155
Preoperative Hb	0.932 (0.884, 0.982)	0.008
Time to definitive management	1.225 (0.746, 2.012)	0.422
ASA score	10.503 (2.402, 45.930)	0.002
Type of anesthesia	0.133 (0.031, 0.564)	0.006
IBL	1.020 (1.008, 1.032)	0.001

Notes: Italics and bold formats indicate that P<0.05.

Abbreviations: ASA score, American Society of Anesthesiologists score; IBL, intraoperative blood loss.

Figure 1 A nomogram to predict the incidence of blood transfusions after intramedullary nail fixation of femoral intertrochanteric fractures.

Figure 2 Calibration curve for nomogram prediction of blood transfusions after intramedullary nail fixation of femoral intertrochanteric fractures.