Table 4.

Comparison of the odds ratios and the confidence intervals of clinicopathologic factors and occurrence of NP compared to TR classified by method 1 and method 2 using different statistical approaches

	Logistic regression		Tu’s Method
Covariates	Method 1	Method 2	Method 1	Method 2
Number of new primary	165 (53.2%)	213 (53.7%)
Contralateral breast cancer	0.69* (0.02-1.36)^	0.80* (0.12-1.49)^	1.28* (0.21-3.22)^	1.50* (0.43-3.52)^
Time to IBTR	0.06* (0.02-0.10)^	0.05* (0.01-0.09)^	0.118* (0.04-0.31)^	0.08* (0.02 – 0.18)^
No systemic recurrence	−1.74* (−2.28 - −1.19)^	−1.51* (−2.01- −1.00)^	−3.99* (−9.55- −1.84)^	−4.04* (−9.67- −1.63)^
Sensitivity	1.0* (Assumed)	1.0* (Assumed)	0.820* (0.663-0.986)^	0.870* (0.716-0.993)^
Specificity	1.0* (Assumed)	1.0* (Assumed)	0.867* (0.763-0.989)^	0.800* (0.690 – 0.977)^

^*Estimated Coefficient;

^{^}95% confidence interval