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Table 4 Cox Regression with shared frailty in univariate and adjusted models -analysis between failures in restorations and associated factors

From: Survival rate of primary molar restorations is not influenced by hand mixed or encapsulated GIC: 24 months RCT

  Unadjusted HR (95%CI) p Adjusted HR (95%CI) p
Group (ref.: hand-mixed)
Encapsulated 0.99 (0.66 to 1.48) 0.967 0.90 (0.60 to 1.35) 0.617
Sex (ref.: female)    *  
Male 0.86 (0.56 to 1.34) 0.516   
Age (ref.: 3 to 4 years-old    *  
5 to 6 years-old 1.27 (0.81 to 1.98) 0.294   
dmfs (ref.: 0 to 3)    *  
4 or more 0.84 (0.51 to 1.39) 0.500   
Dental arch (ref.: upper)    *  
Lower 0.97 (0.65 to 1.45) 0.894   
Molar type (ref.: 1st molar)
2nd molar 0.55 (0.37 to 0.82) 0.003 0.89 (0.59 to 1.34) 0.572
Surface (ref.: Occlusal)
Occlusoproximal 3.97 (2.68 to 5.87)  < 0.001 3.83 (2.44 to 6.00)  < 0.001
  1. HR = hazard ratio; 95% CI = 95% confidence interval
  2. *Variable not included in the adjusted model