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Table 3 Bi-variable and multivariable binary logistic regression: Factors associated with preoperative anemia among major elective orthopedics surgical patients at North West Ethiopia, 2021, (N = 170)

From: Prevalence and risk factors of preoperative anemia in patients undergoing elective orthopedic procedures in Northwest Ethiopia: a multicenter prospective observational cohort study

Variable

Category

Anemia

COR(95%CI)

AOR(95%CI)

P value

Yes

No

Sex

Male

34(30.91%)

76(69.09%)

1

1

-

Female

6(10%)

54(90%)

2.7(1.14–6.2 )

2.5(0.96–6.4)

0.061

Monthly income

High

1(14.3%)

6(85.7%)

1

1

-

Medium

5(21.7%)

18(78.3%)

2.7(0.59–12.7)

3.6(0.49–6.9)

0.203

Low

35(25%)

105(75%)

3.8(1.3–10.9)

5(1.36–7.98)

0.015

Patient with cancer

YES

25 (51%)

24(49%)

1

1

-

NO

16(13.2%)

105(86.8%)

2.1(2.56–6.7)

3.4(3.7–8.84)

0.002

Chemotherapy

YES

31(30.39%)

71(69.61%)

1

1

-

NO

9(13.24%)

59(86.76%)

2.5(0.75–8.31)

5(0.9–28.4)

0.060

Patient with malaria infection

Yes

28(65.12%)

15(34.88%)

1

1

-

No

13(10.24%)

114(89.76%)

2.8(1.26–6.48)

3.2(1.13–8.9)

0.027

DM

Yes

5(50%)

5(50%)

2.4(0.46–12.5)

2.9(0.4–21.4)

0.275

No

35(21.87%)

125(78.13%)

1

1

-

anti-retroviral therapy

Yes

34(34%)

66(66%)

4.4(1.8–10.7)

5.2(1.8–11.1)

0.002

No

6(8.57%)

64(91.43%)

1

1

-

Pervious history of surgery

Yes

20(29.41%)

48(70.59%)

1.7(1.8–3.5)

1(1.43–2.4)

0.001

No

20(19.61%)

82(80.39%)

1

1

-

  1. **: significant (p-value < 0.05) AOR: adjusted odds ratio, COR: crude odds ratio CI: confidence interval, I: Reference.