Online only Table 1:

Relationship between symptom reporting participation rate and baseline patient and caregiver characteristics, estimated from univariate negative binomial regression.

Patient
	n	IRR	95% CI	p-value
Female	26	1.063	0.202–5.584	0.943
Age	52	0.984	0.768–1.260	0.898
Academic performance
All A's (Ref)	16	Ref	Ref	Ref
Mostly As and Bs	19	0.776	0.106 – 5.933	0.807
Mostly Bs and Cs	10	0.379	0.034 – 4.233	0.807
Mostly Cs	4	0.062	0.002 – 2.272	0.130
Internet usage
1–2hours/day (Ref)	18	Ref	Ref	Ref
<1 hour/day	1	0.136	0.0004 – 42.014	0.496
2–4 hours/day	12	0.778	0.085 – 7.085	0.824
>4 hours/day	20	0.820	0.119 – 5.633	0.840
Patient possesses own device	44	2.914	0.256 – 33.224	0.389
Cellphone data plan >10GB/month	30	1.381	0.171 – 11.151	0.762
Race
Caucasian (Ref)	35	Ref	Ref	Ref
Black	9	0.254	0.028 – 2.351	0.228
Asian	4	0.303	0.013 – 7.155	0.459
Other	3	6.030	0.110 – 107.241	0.482
Reason for chemotherapy
Hematologic malignancy	18	Ref	Ref	Ref
HSCT	8	0.009	0.007 – 0.096	<0.0005
Neurologic malignancy	8	0.734	0.068 – 7.921	0.799
Solid malignancy	18	0.937	0.142 – 6.196	0.946
Caregiver age	51	1.000	0.837 – 1.194	0.997
Caregiver education
No college degree (Ref)	26	Ref	Ref	Ref
College degree	24	0.688	0.125 – 3.780	0.667
Caregiver relationship
Mother (Ref)	36	Ref	Ref	Ref
Father	14	1.760	0.274 – 11.318	0.552
Other	1	0.028	0.0001 – 7.665	0.212
Caregiver employment
Full- or part-time (Ref)	30	Ref	Ref	Ref
On leave, unemployed, or retired	20	0.272	0.051 – 1.458	0.128
Proxy
	n	IRR	95% CI	p-value
Caregiver relationship
Mother (Ref)	36	Ref	Ref	Ref
Father	14	2.233	0.003 – 13.646	0.384
Other	1	0.003	0.00001 – 1.101	0.054
Caregiver Age	51	0.998	0.855 – 1.165	0.976
Caregiver Race
Caucasian (Ref)	35	Ref	Ref	Ref
Black	9	0.162	0.017 – 1.499	0.109
Asian	4	0.353	0.017 – 7.410	0.503
Other	3	1.470	0.043 – 50.121	0.830
Caregiver education
No college degree (Ref)	26	Ref	Ref	Ref
College degree	24	1.086	0.203 – 5.819	0.923
Caregiver employment
Full- or part-time (Ref)	30	Ref	Ref	Ref
On leave, unemployed, or retired	20	0.297	0.057 – 1.554	0.151
Caregiver Internet usage
1–2hours/day (Ref)	22	Ref	Ref	Ref
<1 hour/day	8	0.109	0.011 – 1.171	0.067
2–4 hours/day	12	0.667	0.085 – 5.209	0.699
>4 hours/day	8	0.350	0.035 – 3.538	0.374
Caregiver Cellphone data plan >10GB/month	30	1.043	0.382–2.850	0.934
Patient age	52	0.958	0.755 – 1.217	0.727
Female patient	26	0.867	0.167 – 4.512	0.865
Patient Reason for chemotherapy
Hematologic malignancy (Ref)	18	Ref	Ref	Ref
HSCT	8	0.008	0.0007 – 0.101	<0.0005
Neurologic malignancy	8	1.053	0.096 – 11.531	0.966
Solid malignancy	18	1.532	0.237 – 9.900	0.654

IRR = Incidence rate ratio