Table 5 Effect of covariates on survival (Cox).

From: Subjective versus objective, polymer bur-based selective carious tissue removal: 1-year interim analysis of a randomized clinical trial

Covariate

HR (95% CI)

p-value

Protocol

O (ref.)

  

S

0.963 (0.536–1.761)

0.902

Gender

Male (ref.)

  

Female

1.095 (0.551–2.173)

0.796

Age (per year)

0.963 (0.495–1.875)

0.912

Primary molar

First (ref.)

  

Second

0.574 (0.312–1.028)

0.062

Arch

Upper (ref.)

  

Lower

1.006 (0.551–1.837)

0.983

Cavity extension

Single-surface (ref.)

  

Multi-surfaces

4.597 (1.700–12.431)

0.003

  1. Mean hazard rate (HR) and 95% confidence interval (95% CI) as well as levels of significance between groups (p-values) are shown. Significant differences are highlighted in bold. O: objective, polymer bur-based removal; S – subjective removal.
Back to article page