Table 6.

Independent predictors of the observed surveillance cost^a. Multivariate analysis.

	Coeff	SD b	p-value c
Quarter	−0.13	0.01	<0.0001
Recurrence versus absence of recurrence
Recurrence detected during medical visit for symptoms	0.85	0.29	0.005
Recurrence detected during routine medical visit	1.42	0.30	<0.0001
Gender
Men versus women	0.004	0.07	0.96
Age at diagnosis
65–74 years versus <65 years	−0.15	0.09	0.09
≥ 75 years versus <65 years	−0.25	0.09	0.007
Urban area
Rural versus urban	0.07	0.08	0.40
Administrative area
Côte d’Or versus Saône et Loire	−0.09	0.07	0.20
Tumour location
Colon versus rectum	−0.07	0.09	0.45
TNM stage at diagnosis
II versus I	0.18	0.10	0.06
III +IV versus I	0.22	0.12	0.07
Preoperative complications
Yes versus no complications	−0.23	0.12	0.06
Comorbidities
Yes versus no comorbidities	0.05	0.08	0.48
Adjuvant chemotherapy
Yes versus no chemotherapy	0.93	0.10	<0.0001
Adjuvant radiotherapy
Yes versus no radiotherapy	0.26	0.12	0.03
Distance to the General Practitioner
> 0 kilometers versus 0 kilometers	0.02	0.07	0.83
Distance to the gastroenterologist
≥ 15 kilometers versus <15 kilometers	−0.03	0.08	0.83
Intercept	3.39

^aReimbursement prices were used as a proxy of costs

^bSD = standard deviation;

^ca p-value lower than 5% showed significant results.