Table 2: Result of Multiple Logistic Regression Analysis of incidence of pregnancy among HIV positive women on ART in Finote Selam general hospital, Oct. 2016 to Sep. 2019.

Covariate

Category

B

S.E.

Wald

df

Sig.

Exp(B)

 

95.% CI EXP (B)

Lower

Upper

WHO clinical stage

Stage I (ref.)

 

 

16.320

3

0.001*

 

 

 

 Stage II

-1.285

0.760

2.857

1

0.091

0.277

0.062

1.228

Stage III

-5.085

1.310

15.065

1

0.000*

0.006

0.000

0.081

Stage IV

-3.745

1.846

4.114

1

0.043*

0.024

0.001

0.882

Spouse's HIV status

Negative (ref.)

 

 

6.871

2

0.032*

 

 

 

Positive

1.614

0.742

4.725

1

0.030*

5.023

1.172

21.526

Unknown

-0.464

0.761

0.371

1

0.542

0.629

0.141

2.797

Marital status

 

Married (ref.)

 

 

25.368

3

0.000*

 

 

 

Unmarried

-4.326

1.040

17.315

1

0.000*

0.013

0.002

0.101

Divorced

-4.904

1.111

19.485

1

0.000*

0.007

0.001

0.065

Widowed

-3.920

1.328

8.715

1

0.003*

0.020

0.001

0.268

Contraception use

 

Never (ref.)

 

 

19.940

3

0.000*

 

 

 

Rarely

-.1.026

0.978

1.102

1

0.294

0.358

0.053

2.435

Mostly

-4.100

1.105

13.774

1

0.000*

0.017

0.002

0.144

Always

-3.671

1.106

11.019

1

0.001*

0.025

0.003

0.222

CD4 cell count

< 250 (ref.)

 

 

22.550

3

0.000*

 

 

 

250-350

-2.700

1.286

4.410

1

0.036*

0.067

0.005

0.835

351-500

1.594

1.060

2.263

1

0.133

4.925

0.617

39.322

> 500

2.254

1.030

4.789

1

0.029*

9.522

1.265

71.674

Time on ART follow up

>= 24 months

 

 

11.978

2

0.003*

 

 

 

25-48 months

3.062

0.888

11.897

1

0.001*

21.363

3.750

121.681

> 48 months

2.135

0.926

5.315

1

0.021*

8.460

1.377

51.973

Body weight of women

< 50 kg (ref.)

 

 

6.284

2

0.043*

 

 

 

50-60 kg

0.438

0.797

0.303

1

0.582

1.550

0.325

7.387

> 60 kg

1.949

0.907

4.616

1

0.032*

7.018

1.186

41.515

Occupation

 

Employed(ref.)

 

 

10.108

2

0.006*

 

 

 

Unemployed

-2.334

0.827

7.976

1

0.005*

0.097

0.019

0.490

Housewife

-2.636

0.904

8.499

1

0.004*

0.072

0.012

0.422

Age

 

15-24 (ref.)

 

 

16.401

3

0.001*

 

 

 

25-29

0.166

0.761

0.048

1

0.827

1.181

0.266

5.249

30-35

-2.423

1.030

5.538

1

0.019*

0.089

0.012

0.667

> 35

-5.035

1.333

14.255

1

0.000*

0.007

0.000

0.089

Child alive

Have a child

-1.892

0.664

8.111

1

0.004*

0.151

0.041

0.554

Constant

 

1.569

2.442

0.413

1

0.520

4.804

 

 

 

ref. = Reference category which is the first category; * = significant at 5% significance level