Table 1.

Registration for and use of the patient portal by age group and race/ethnicity^a.

Use of the patient portal in 2013		Age	All	Non-Hispanic white	Black	Latino	Filipino	Chinese
Was registered to use the patient portal by end of 2013, %
		65-79	77.1	81.1	54.1b	62.5b	60.5b	81.4
		65-69	82.2	86.3	61.3b	67.0b	65.4b	86.1
		70-74	78.6c	82.6c	55.4b,c	63.7b,d	61.1b,c	83.7
		75-79	71.5c	75.5c	47.3b,c	57.9b,c	55.2b,c	75.6b,c
Signed onto the patient portal ≥1 time in 2013 (if registered to use patient portal at least part of 2013), %
		65-79	80.5	82.2	65.9b	70.8b	68.9b	85.5b
		65-69	83.3	85.0	69.4b	75.6b	74.1b	87.5
		70-74	81.6c	83.5c	66.9b	71.8b,d	69.1b,c	86.2b
		75-79	76.4c	78.2c	61.3b,c	65.7b,c	63.3b,c	83.1b,c
Used the patient portal to send a message to a doctor, view lab test results, order a prescription refill, or make an appointment ≥1 time in 2013, %
	All members
		65-79	59.5	64.2	32.9b	41.4b	38.8b	67.3b
		65-69	65.9	70.8	39.6b	47.7b	45.3b	72.7
		70-74	61.7c	66.6c	34.3b,c	42.8b,c	39.3b,c	70.1b
		75-79	51.9c	56.3c	26.3b,c	35.1b,c	32.3b,c	60.3c,e
	Members registered to use the patient portal for at least part of 2013
		65-79	77.1	79.1	60.9b	66.2b	64.1b	82.6b
		65-69	80.1	82.0	64.7b	71.2b	69.3b	84.4
		70-74	78.5c	80.6 c	62.0b	67.2b,d	64.3b	83.8b
		75-79	72.6c	74.6 c	55.7b,c	60.7b,c	58.5b,c	79.8b,c
Sent a secure message through the patient portal ≥1 time in 2013, %
	All members
		65-79	46.3	50.8	23.3b	30.1b	26.1b	49.1
		65-69	52.3	56.9	29.4b	35.2b	31.9b	54.2
		70-74	48.1c	52.8c	24.1b,c	31.1b,c	26.5b,c	52.0
		75-79	39.7c	43.7c	17.9b,c	25.4b,c	20.4b,c	42.2c
	Members registered to use the patient portal for at least part of 2013
		65-79	60.1	62.6	43.1b	48.2b	43.1b	60.3b
		65-69	63.5	66.0	47.9b	52.5b	48.8b	63.0
		70-74	61.3b	63.9b	43.6b,c	48.8c	43.3b,c	62.1
		75-79	55.5b	57.9b	37.9b,c	44.0b,c	36.9b,c	55.8c
Viewed lab test results using the patient portal ≥1 time in 2013, %
	All members who had ≥1 lab test in 2013
		65-79	62.8	68.0	33.9b	42.7b	40.0b	69.1
		65-69	69.2	74.5	40.5b	49.6b	47.8b	74.6
		70-74	64.6c	69.9c	35.0b,c	44.1b,c	40.3b,c	71.7
		75-79	55.6c	60.6c	27.6b,c	36.0b,c	32.7b,c	62.2c
	Members who had ≥1 lab test in 2013 and were registered to use the patient portal during at least part of 2013
		65-79	79.6	82.1	60.6b	66.5b	64.1b	83.6
		65-69	82.4	84.8	63.7b	71.4b	70.2b	85.7
		70-74	80.6c	83.0 c	61.3c	67.6b,d	64.3b,c	84.9
		75-79	75.7c	78.3 c	56.4b,c	60.9b,c	57.3b,c	80.3c
Ordered a prescription refill using the patient portal ≥1 time in 2013, %
	All members who refilled ≥1 prescription in 2013
		65-79	35.0	38.6	16.5b	21.2b	18.5b	37.0
		65-69	42.1	46.5	21.2b	26.6b	22.9b	44.4
		70-74	36.5c	40.4c	17.5b,c	21.8b,c	18.1b,c	38.4
		75-79	28.1c	31.0c	11.9b,c	16.9b,c	15.5b,c	31.1c
	Members who refilled ≥1 prescription in 2013 and were registered to use the patient portal at least part of 2013
		65-79	44.3	46.6	29.3b	33.0b	29.7b	44.8
		65-69	49.9	52.6	32.9b	38.0b	33.8b	50.8
		70-74	45.4c	47.8c	30.5b	33.3b,d	28.7b,c	45.2d
		75-79	38.3c	40.0c	24.3b,c	28.8b,c	27.1b,c	40.3c

^aCell percentages represent use among adults in that age, race/ethnic, or age-race/ethnic subgroup. The denominator for cell percentages in the “All” column includes all non-Hispanic white, black, Latino, Filipino, and Chinese members in that age group. See Multimedia Appendix 1 for cell denominators. Due to the very large denominators for all cells, comparisons with P values ≥.055 are not reported. See Multimedia Appendix 3 for detailed P values.

^bSignificantly differs (P<.001) from non-Hispanic whites within same age group after controlling for sex.

^cSignificantly differs (P<.01) from 65-69 age group within All or within same race/ethnic group after controlling for sex.

^dSignificantly differs (P<.01) from non-Hispanic whites within same age group after controlling for sex.

^eSignificantly differs (P<.05) from non-Hispanic whites in same age group after controlling for sex.