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Table 2 Univariate linear regression test examining the association between biopsychosocial variables and PHQ-9 score of patients

From: Comorbidity of depression and diabetes: an application of biopsychosocial model

Variables (reference category)

β (95% CI)

p value

Current age

−0.03 (−0.08, 0.02)

0.21

Age at diagnosis

−0.05 (−0.1, −0.001)

0.04

Female gender (male)

1.4 (0.4, 2.4)

0.01

Addis Ababa residence (outside Addis Ababa)

−0.5 (−2.0, 1.0)

0.54

Monthly family income (ETB)

−0.001 (−0.001, −0.0002)

<0.001

Marital status (married)

 Divorced

2.2 (0.7, 3.7)

0.01

 Widowed

0.3 (−1.1, 1.6)

0.70

Religion (orthodox christian)

 Muslim

−1.4 (−3.1, 0.3)

0.11

 Other religion

−0.4 (−2.0, 1.3)

0.67

Ethnicity (others)

 Amhara

−0.2 (−1.2, 0.8)

0.67

 Oromo

1.0 (−0.4, 2.4)

0.17

Educational status (no formal education)

 Primary school (1–8)

1.8 (0.7, 3.0)

0.002

 Secondary school (9–12)

−0.7 (−1.9, 0.5)

0.23

 College/university

−1.4 (−2.4, −0.3)

0.01

Occupation (others)

 Civil servant

−0.7 (−2.0, 0.6)

0.28

 House wife

1.7 (0.4, 3.0)

0.01

 Private worker

−0.8 (−2.2, 0.6)

0.26

 Pensioned

−0.7 (−2.0, 0.5)

0.23

 No employment

1.1 (−0.7, 2.2)

0.10

Waist circumference

0.01 (−0.4, 0.1)

0.74

Duration of diabetes

0.03 (−0.03, 0.1)

0.35

Duration of diabetes treatment

0.03 (−0.04, 0.1)

0.36

Fasting blood glucose

0.01 (−0.001, 0.01)

0.09

Number of co-morbidity

0.6 (0.02, 1.1)

0.04

Number of prescribed medication administration per day

0.2 (−0.05, 0.4)

0.13

Number of diabetic complication

0.5 (0.1, 0.9)

0.02

Body mass index

0.1 (0.03, 0.3)

0.04

Combined insulin injection (single insulin injection)

1.0 (−1.9, 0.4)

0.42

Insulin injection plus oral hypoglycemic (single insulin injection)

0.3 (−1.3, 1.9)

0.72

Oral hypoglycemic agent (single insulin injection)

−0.9 (−2.0, 0.1)

0.08

Cardiovascular disease

0.5 (−0.5, 1.5)

0.33

Respiratory disease

0.5 (−1.6, 2.5)

0.66

Renal disease

0.6 (−1.7, 2.9)

0.62

Neurologic disease

1.8 (−2.3, 5.9)

0.39

Others comorbidity

0.7 (−0.4, 1.8)

0.22

Diabetic retinopathy

1.0 (0.02, 2.0)

0.04

Diabetic nephropathy

2.0 (0.8, 3.1)

0.001

Diabetic neuropathy

1.1 (0.03, 2.2)

0.04

Sexual dysfunction

−1.0 (−2.2, 0.1)

0.08

Physical disability

1.2 (0.2, 2.2)

0.02

Poor social support

3.1 (2.1, 4.1)

<0.001

Doing physical activity

−1.5 (−2.7, −0.3)

0.01

Fear of diabetic complication and death (no perception at all)

1.6 (0.6, 2.7)

0.003

Not fearing diabetic complication and death (no perception at all)

−2.0 (−3.1, −0.9)

<0.001

High health care cost (no perception at all)

0.4 (−0.7, 1.5)

0.50

Not high health care cost (no perception at all)

−0.7 (−2.0, 0.5)

0.26

Negative life event in the last 6 months

2.0 (0.9, 2.9)

<0.001

  1. β regression coefficient; CI confidence interval