Table 4.

Results of subgroup analysis by intervention feature in relation to reductions in hemoglobin A1c levels, systolic blood pressure, and diastolic blood pressure.

Features		HbA1ca reduction	SBPb reduction	DBPc reduction
Logging
	BGd	— e	Δf	•g
	BPh	Δ	•	Δ
	Body weight	Δ	Δ	×i
	Medication	•	Δ	Δ
	Diet	Δ	×	×
	Physical activity	Δ	×	Δ
	Mood	—	—	—
Personalized feedback
	Automated feedback	Δ	•	•
	Medication adjustment aid	Δ	—	—
	Personalized goal setting	×	•	•
	Reminders	Δ	•	Δ
Communication with HCPj		•	—	—
Education materials		Δ	•	Δ
Data visualization		Δ	•	×

^aHbA_1c: hemoglobin A_1c.

^bSBP: systolic blood pressure.

^cDBP: diastolic blood pressure.

^dBG: blood glucose.

^e—: Subgroup analysis was not performed for the feature because there were fewer than two trials in one of the subgroups.

^fΔ: Similar changes were found between the two subgroups (presence of the feature vs absence of the feature).

^g•: Presence of the feature was related to a more favorable effect on the outcome.

^hBP: blood pressure.

ⁱ×: Absence of the feature was related to a more favorable effect on the outcome.

^jHCP: health care provider.