Table 4.

Relationships between self-reported frequency of patient portal feature use and glycemic control among patient portal users (N=54)

			Spearman's ρ
			Feature number										A1c value
Feature number	How often do you use MHAV to…	Percentage reporting frequent use† (%)	1	2	3	4	5	6	7	8	9	10
1	Review laboratory results?	76	1.00										NS
2	View your medical record?	61	0.69**	1.00									NS
3	Send a message to your doctor? (SM)	63	0.60**	0.63**	1.00								−0.26#
4	Request an appointment? (SM)	36	NS	0.36**	0.36**	1.00							−0.29*
5	Access billing information?	19	NS	0.31*	NS	0.31*	1.00						NS
6	Access telephone directory?	19	NS	NS	NS	NS	NS	1.00					NS
7	Find a doctor?	11	NS	NS	NS	NS	0.37**	0.31*	1.00				NS
8	Pay medical bills?	11	NS	NS	NS	NS	0.66**	0.36**	0.38**	1.00			NS
9	Access clinic maps/directions?	6	NS	NS	NS	NS	0.36**	0.52**	0.59**	0.37**	1.00		NS
10	Access insurance information?	2	NS	NS	NS	0.37**	0.56**	NS	NS	0.44**	0.33*	1.00	NS

#p<0.08; *p<0.05; **p<0.01.

†Self-reported use of MHAV features; ≥4 indicate frequent use (on a scale from 1=‘never’ to 6=‘very often’).

A1c, hemoglobin A1c; MHAV, MyHealthAtVanderbilt; NS, not significant; SM, secure messaging.