Table 3.

Binary logistical and Cox regression of GQWL vs. GQPDD and operating surgeon

Regression
Variable	Binary logistical regression for snapshot 3-year recurrence rate		Cox regression for disease-free survival
	p value	Multi-variate odds ratio (95% CI)	p value	Multi-variate hazard ratio (95% CI)
WL (ref)		1.00		1.00
PDD	0.001	0.44 (0.27–0.71)	0.003	0.57 (0.39–0.83)
Surgeon A (ref)		1.00		1.00
Surgeon B	0.94	0.98 (0.52–1.85)	0.86	1.05 (0.64–1.71)
Surgeons (other)	0.83	1.08 (0.52–2.24)	0.84	1.05 (0.63–1.75)

Risk group was not included as a variable in regression since there was more intermediate and high-risk disease identified in the PDD group thus would adjust regression in favour of PDD