Table 6 Stepwise linear regression analysis for the prediction of chewing and OHRQoL scores before and after treatment among the study sample (n = 90, 46 RPD and 44 CD).

From: Impact of a removable prosthesis on chewing ability, quality of life, and patient satisfaction

Dependent variable

Predictors

UnSC

SC

t

P

95% CI for B

B

SE

Beta

Lower bound

Upper bound

Chewing scores before treatment (R2 = 0.254)

Constant

9.995

1.460

–

6.847

 < 0.001

6.940

13.050

Income

1.695

0.666

0.504

2.547

0.020

0.302

3.088

OHRQoL scores before treatment (R2 = 0.440)

Constant

40.200

4.788

–

8.396

 < 0.001

30.141

50.259

Gender

 − 10.600

2.838

 − 0.836

 − 3.735

0.002

 − 16.562

 − 4.638

Smoking

 − 7.475

2.838

 − 0.589

 − 2.634

0.017

 − 13.437

 − 1.513

Chewing scores after treatment (R2 = 0.132)

Constant

21.828

2.070

–

10.543

 < 0.001

17.713

25.943

Smoking

 − 2.300

0.933

 − 0.247

 − 2.464

0.016

 − 4.155

 − 0.445

Number of prostheses

 − 2.744

1.124

 − 0.245

 − 2.441

0.017

 − 4.979

 − 0.509

OHRQoL scores after treatment (R2 = 0.183)

Constant

26.602

2.372

–

11.217

 < 0.001

21.889

31.315

Chewing scores after treatment

 − 0.491

0.142

 − 0.345

 − 3.450

0.001

 − 0.774

 − 0.208

Chewing scores before treatment among RPD patients (R2 = 0.347)

Constant

5.795

2.606

–

2.224

0.035

0.428

11.161

Age

2.481

0.842

0.480

2.948

0.007

0.748

4.214

Gender

2.640

1.075

0.399

2.455

0.021

0.426

4.855

OHRQoL scores after treatment among RPD patients (R2 = 0.423)

Constant

14.081

9.546

–

1.475

0.161

 − 6.265

34.427

Number of Kennedy modifications in the lower denture

4.559

1.757

0.678

2.594

0.020

0.813

8.305

OHRQoL scores before treatment among CD patients (R2 = 0.102)

Constant

26.818

1.528

–

17.552

 < 0.001

23.735

29.902

Smoking

 − 4.727

2.161

 − 0.320

 − 2.188

.034

 − 9.088

 − 0.367

OHRQoL scores after treatment among CD patients (R2 = 0.304)

Constant

33.846

3.622

–

9.344

 < 0.001

26.531

41.160

Chewing score after treatment

 − 0.858

0.211

 − 0.553

 − 4.068

 < 0.001

 − 1.285

 − 0.432

Smoking

 − 4.068

1.783

 − 0.310

 − 2.282

0.028

 − 7.668

 − 0.468

  1. OHRQoL Oral health-related quality of life, RPD Removable partial denture, CD Complete denture, R2 Coefficient of determination, UnSC Unstandardized coefficient, SC Standardized coefficient, B Beta statistics, SE Standard Error, t t statistics, P Two-tailed probability value, CI Confidence intervals.
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