Table 3:

Proportional hazard competing risks model of discontinuation of follow up

Variable	Level	Univariate		Multivariate
		Hazard Ratio (95% conf int)	p	Hazard Ratio (95% conf int)	p
Age at diagnosis	> 60	0.91 (0.61 – 1.36)	0.65
	≤ 60	Reference
Sex	Female	1.13 (0.74 – 1.73)	0.59
	Male	Reference
Race	Black	0.67 (0.11 – 4.23)	0.52
	Other/Unknown	1.67 (0.64 – 4.32)
	White	Reference
Primary site	Oral cavity	3.38 (1.06 – 10.76)	0.29
	Oropharynx	2.51 (0.75 – 8.34)
	Salivary	2.84 (0.76 – 10.51)
	Larynx	2.77 (0.83 – 9.27)
	Other	Reference
Histologic type	SCC or variant	0.90 (0.52 – 1.56)	0.72
	Sarcoma/neurogenic	–
	Other histology	Reference
Behavior	In situ	1.10 (0.91 – 3.20)	0.098	1.23 (0.65 – 2.31)	0.53
	Invasive	Reference		Reference
Multidisciplinary Treatment	Multimodality	0.38 (0.25 – 0.58)	<0.0001	0.36 (0.17 – 0.73)	0.0050
	Single modality	Reference		Reference
AJCC Stage	3-4	0.52 (0.34 – 0.79)	0.010	1.10 (0.53 – 2.28)	0.91
	Unknown	0.75 (0.34 – 1.63)		0.90 (0.41 – 1.98)
	0-2	Reference		Reference
Residence type	Rural	1.15 (0.77 – 1.71)	0.49
	Urban	Reference
Driving distance	≥ 100 miles	1.81 (1.22 – 2.70)	0.0034	1.90 (1.26 – 2.85)	0.0021
	< 100 miles	Reference		Reference
Marital status	Single/separated/div/wid	1.70 (1.11 – 2.61)	0.041	1.56 (1.01 – 2.41)	0.13
	Unknown	1.54 (0.80 – 2.97)		1.35 (0.70 – 2.62)
	Married/partner	Reference		Reference
Insurance status	Medicare/Tricare/VA	0.90 (0.59 – 1.38)	0.76
	Medicaid	0.97 (0.44 – 2.12)
	No insurance	1.68 (0.53 – 5.30)
	Private / NOS	Reference
Treatment site	Some Tx elsewhere	0.88 (0.50 – 1.56)	0.66
	All Tx at UIHC	Reference
Survivorship care plan 1st yr	Yes	1.01 (0.63 – 1.62)	0.96
	No	Reference