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Table 4 Results of subgroup analyses

From: Hypocalcemia was associated with increased perioperative blood loss and blood transfusion in elderly patients with hip fracture: a retrospective study

 

Normocalcemia

Hypocalcemia

P value

Type of surgery

   

PFNA (n = 197)

   

TBL values (ml)

   

 TBLpost1

749.03 ± 383.27

871.20 ± 444.29

0.040

 TBLpost5

983.97 ± 412.30

1164.82 ± 550.14

0.009

Transfusion rate n (%)

   

 Preoperative

25 (22.94)

32 (36.36)

0.039

 Postoperative

1 (0.92)

6 (6.82)

0.046

 Perioperative

26 (23.85)

34 (38.64)

0.025

Transfusion volume (ml)

   

 Preoperative

400.00 ± 0.00

425.00 ± 89.69

0.185

 Postoperative

366.67 ± 57.74

730.00 ± 200.28

0.012

Perioperative

517.86 ± 176.50

775.00 ± 412.31

0.029

CCS (n = 18)

   

TBL values (ml)

   

 TBLpost1

320.79 ± 150.45

640.94 ± 139.20

< 0.001

 TBLpost5

435.03 ± 114.54

808.32 ± 113.94

< 0.001

Transfusion rate n (%)

   

 Preoperative

0 (0)

0 (0)

 

 Postoperative

0 (0)

0 (0)

 

 Perioperative

0 (0)

0 (0)

 

Transfusion volume (ml)

   

 Preoperative

0

0

 

 Postoperative

0

0

 

 Perioperative

0

0

 

HA (n = 264)

   

TBL values (ml)

   

 TBLpost1

489.58 ± 320.81

669.38 ± 367.31

< 0.001

 TBLpost5

710.13 ± 408.01

1031.19 ± 523.09

< 0.001

Transfusion rate n (%)

   

 Preoperative

38 (24.36)

32 (29.63)

0.340

 Postoperative

10 (6.41)

10 (9.26)

0.390

 Perioperative

40 (25.64)

40 (37.04)

0.048

Transfusion volume (ml)

   

 Preoperative

481.40 ± 146.80

633.33 ± 428.95

0.049

 Postoperative

400.00 ± 0.00

414.29 ± 134.52

0.788

 Perioperative

518.18 ± 188.35

566.67 ± 353.15

0.433

THA (n = 203)

   

TBL values (ml)

   

 TBLpost1

509.06 ± 272.77

640.69 ± 317.93

0.002

 TBLpost5

783.52 ± 314.12

982.41 ± 472.33

0.002

Transfusion rate n (%)

   

 Preoperative

25 (19.38)

26 (35.14)

0.013

 Postoperative

2 (1.55)

6 (8.11)

0.023

 Perioperative

25 (19.38)

26 (35.14)

0.013

Transfusion volume (ml)

   

 Preoperative

534.78 ± 194.49

592.59 ± 458.20

0.555

 Postoperative

400.00 ± 0.00

480.00 ± 109.54

0.178

 Perioperative

570.59 ± 246.89

692.11 ± 427.68

0.281

  1. PFNA, proximal femoral nail antirotation; CCS, cannulated compression screws; HA, hemiarthroplasty; THA, total hip arthroplasty; TBL, total blood loss
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