Table 2.

Network Characteristics and DSP Involvement in Treatment Decision Making (N=2502), stratified by Partner Status

Network Characteristics	Overall N=2502*	Not Partnered N=961	Partnered N=1496	p-values
	weighted %	weighted %	weighted %
Network Size (n=2457)				<0.001
0	9.8	15.5	6.2
1	19.0	15.9	21.1
2	20.5	19.3	21.2
3+	50.7	49.3	51.6
DSP Relationship to Patient**				<0.001
Partner/Spouse	21.2	2.3	37.9
Children	31.2	38.4	27.0
Siblings	11.3	15.5	8.0
Parent	6.1	6.4	5.5
Other Family Members	7.4	11.0	4.6
Friends/Other	18.8	22.3	13.5
Multiple	4.0	4.1	3.6
DSP Involvement
Attended Appointments (n=2394)				<0.001
Never/rarely/often	26.7	37.7	19.8
Very Often/always	73.3	62.3	80.2
Took Notes during Appointments (n=2377)				0.076
Never/rarely/often	49.5	51.9	47.9
Very Often/always	50.5	48.1	52.1
Talked with them about Treatment (n=2364) Options				<0.001
Never/rarely/often	25.8	32.9	21.3
Very Often/always	74.2	67.1	78.7
Shared information about treatment from other sources (n=2380)				0.49
Never/rarely/often	43.2	44.1	42.6
Very Often/always	56.8	55.9	57.4
Patient-reported DSP Measures
Patient-reported Satisfaction with DSP (n=2457)				<0.001
Low/Moderate (<4)	23.5	30.4	19.0
High (≥4)	76.5	69.6	81.0
Patient-reported DSP Importance (n=2457)				<0.001
Low/Moderate (<4)	31.4	38.7	26.8
High (≥4)	68.6	61.3	73.2

^*N is unweighted and does not add up to 2502 due to missingness.

^**Relationships were categorized for all reported DSPs for each patient