Risk factors for pressure ulcers from the use of a pelvic positioner in hip surgery: a retrospective observational cohort study in 229 patients

Table 3 Data comparison between patients with IAPUs and those without IAPUs

	With IAPUs (n = 7)	Without IAPUs (n = 258)	p value
Age (years)	60.9 ± 26.6	60.2 ± 14.3	0.49
HT (cm)	150.0 ± 9.4	156.8 ± 9.6	0.04
WT (Kg)	53.2 ± 7.9	56.9 ± 12.3	0.53
BMI (Kg/m²)	23.9 ± 4.7	23.1 ± 4.2	0.77
Hemoglobin (g/dl)	13.0 ± 0.7	13.0 ± 1.5	0.97
Albumin (g/dl)	4.4 ± 0.3	4.2 ± 0.4	0.33
Length of surgery (minutes)	267.4 ± 122.0	172.5 ± 66.1	0.0026
Amount of bleeding (ml)	412.1 ± 179.3	298.2 ± 242.5	0.041
Braden Scale score	22.1 ± 1.1	21.2 ± 0.6	0.22
Sex (Male:Female)	2:5	62:196	0.78
Steroid use (Yes:No)	0:7	14:244	0.53
Diabetes (Yes:No)	1:6	33:225	0.91
Smoking (Yes:No)	0:7	35:223	0.30
Pelvic positioner (PS:ASIS)	6:1	84:174	0.0034
Surgical procedure (THA:reTHA:PO:Ir)	3:2:2:0	219:20:14:5	0.011

The data are shown as mean ± SD for continuous variables or number for categorical variables
Residual analysis was performed in surgical procedures; revision THA and pelvic or proximal femoral osteotomy were more frequently performed in in patients with IAPUs than in those without (p = 0.011, adjusted standardized residual in revision THA = 1.97, adjusted standardized residual in pelvic or proximal femoral osteotomy = 2.53)
IAPU Intraoperatively acquired pressure ulcer, HT Height, WT Weight, BMI Body mass index, NPUAP National Pressure Ulcer Advisory Panel, THA Total hip arthroplasty, re THA Revision THA, PO Periacetabular osteotomy, PS Pubic symphysis type, ASIS Anterior superior iliac spine type, DDH Developmental dysplasia of the hip

ISSN: 1754-9493