Table 4 Hierarchical regression equation to predict depressive symptoms according to the Geriatric Depression Scale

Step of the model

R² change

F change

Significance

Demographic variables

0.018

5.280

p = 0.001

Individual Illnesses

0.109

7.219

p < 0.0005

Number of illnesses

0.05

4.872

p = 0.028

Pain severity

0.028

28.866

p < 0.0005

Step 2: Individual Predictors

Beta

t-value

Significance

Marital status

.063

2.739

p = 0.006

Chronic pain

.468

5.969

p < 0.0005

Diabetes

.326

4.309

p < 0.0005

Neurological disease

.364

2.708

p = 0.007

Respiratory condition

.289

3.720

p < 0.0005

Step 3: Individual predictors

Beta

t-value

Significance

Number of illnesses

.137

2.207

p = 0.028

Step 4: Individual predictors

Beta

t-value

Significance

Pain severity

.191

5.373

p < 0.0005