Table 2.

Intervention use reported across included studies.

Study design and study		Measures of intervention use; follow-up timing	Key findings
Randomized controlled trial
	Tighe et al [26], suicide risk	App activity completion (total of 6); during intervention over 6 wksa	Participant completion: 6 activities=85% (34/40); 5 activities=2% (1/40); 2 activities=13% (5/40)
Single-arm postquantitative
	Fletcher et al [32], new fatherhood	Click rates for SMSb links, response to SMS (mood trackers); during intervention over 6 wks	Participant click rates: 56% Routines: Aboriginal and Torres Strait Islander Parents, 41% Baby Talk, 4% Crying, 0% Bonding for Dads and Postnatal depression and women. Participant response to mood trackers: 90% to at least 1×SMS, 75% to total SMS during trial (106/141)
	Kirkham et al [36], postpartum blood glucose testing	Message response via mHealth (incl. SMS, phone call, email, and social media); during intervention over 24 mc	14% (18/252) total responses via mHealth, including 3% response to SMS (1/29)

^awk(s): week(s).

^bSMS: short messaging service.

^cm: month.