Table 4 Prediction of the contribution of treatment protocol towards the need for root canal treatment among the study population using the hierarchical logistic regression analysis (n = 84).

From: Treatment of symptomatic, deep, almost cariously exposed lesions using ozone

Variable blocks*

B

SE

df

Sig

Exp (B)

Exp (B) 95% CI

Lower

Upper

Block 1 (Nagelkerke R2 = .011. Hosmer and Lemeshow test probability value (P) = .594)

Gender

.313

.727

1

.667

1.368

.329

5.686

Age

− .041

.179

1

.819

.960

.675

1.364

Affected tooth

.170

.325

1

.601

1.185

.627

2.240

Constant

− 2.035

4.388

1

.643

.131

–

–

Block 2 (Nagelkerke R2 = .166. Hosmer and Lemeshow test probability value (P) =.385)

Gender

.312

.751

1

.678

1.366

.314

5.948

Age

− .019

.198

1

.925

.982

.665

1.448

Affected tooth

.158

.343

1

.646

1.171

.598

2.293

Treatment protocol

2.257

1.088

1

.038

9.551

1.133

80.507

Constant

− 6.383

5.241

1

.223

.002

–

–

  1. B = the B coefficient of the model, SE = Standard error, df = Degree of freedom, Sig. = Significance of two tailed probability value (P), Exp (B) = Exponentiated B coefficients, CI = Confidence intervals. *The predicted overall percentage for each Block equals 89.3%.
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