Table 3.

Quality scores comparison of apps with and without a specific characteristic.

Characteristics		Present				Not present				Difference
			n (%)		Mean (SD)		n (%)		Mean (SD)		Mean (95% CI)
Pricing
	Free		143 (77.7)		2.66 (.38)		41 (22.3)		2.55 (.33)		.11 (–.24 to .02)
	No advertisementsa		95 (66.4)		2.67 (.38)		48 (33.6)		2.64 (.37)		.03 (.10 to .16)
Personal data
	Age		75(40.8)		2.78 (.39)		109 (59.2)		2.53 (.32)		.25 (.15 to .35)
	Gender		75 (40.8)		2.76 (.36)		109 (59.2)		2.54 (.35)		.22 (.11 to .32)
	Height		71 (38.6)		2.74 (.35)		113 (61.4)		2.56 (.37)		.18 (.07 to .28)
	Weightb		99 (53.8)		2.74 (.37)		85 (46.2)		2.50 (.33)		.24 (.14 to .34)
Blood pressure measurements
	Side (left or right arm)		28 (15.2)		2.83 (.40)		156 (84.8)		2.60 (.35)		.23 (.09 to .38)
	Position (eg, sitting, lying)		26 (14.1)		2.87 (.42)		158 (85.9)		2.60 (.35)		.27 (.12 to .42)
	Date and timeb		182 (98.9)		2.64 (.36)		2 (1.1)		2.04 (.61)		.60 (.08 to 1.01)
Other features
	Reminder functionb		53 (28.8)		2.82 (.36)		131 (71.2)		2.56 (.35)		.26 (.15 to .38)
	Analysis toolb		158 (85.9)		2.67 (.37)		26 (14.1)		2.40 (.26)		.27 (.12 to .42)
	Data exportb		120 (65.2)		2.71 (.39)		64 (34.8)		2.48 (.28)		.23 (.13 to .35)
	Data upload from blood pressure meter		27 (14.7)		2.94 (.35)		157 (85.3)		2.58 (.35)		.36 (.22 to. 51)
	Needs Web access to function		10 (5.4)		2.88 (.40)		174 (94.6)		2.62 (.36)		.26 (.03 to .50)
	Password protection		43 (23.4)		2.78 (.38)		141 (76.6)		2.59 (.38)		.19 (.07 to .32)
	Data storage (local)		181 (98.4)		2.62 (.36)		3 (1.6)		3.10 (.52)		–.48 (–.89 to –.05)
	Data storage (cloud)		19 (10.3)		3.04 (.46)		165 (89.7)		2.58 (.33)		.46 (.29 to .62)

^aOnly free apps included; paid apps were presumed to have no advertisements.

^bKey app features for self-management based on guidelines and literature.