Table 2.

Overview of the interventions.

Study	Message purpose	Time (postoperative days)	Opioids	Pain scale	Alerts	Reminders
Anthony et al [32]	Monitoring	7	yesa	0-10	no	yes
Anthony et al [33]	Monitoring	14	yes	0-10	no	no
Booth et al [36]	Monitoring	60	yes	0-10	yes	no
Brix et al [35]	Adherence/monitoring	4	no	0-10	yes	no
Carrier et al [37]	Monitoring	7	yesa	0-10	no	yes
Chen et al [38]	Monitoring	14	yesa	0-10	no	yes
Day et al [39]	Education/adherence	14	yesa	no	yes	no
Nelson et al [40]	Monitoring	21	yes	0-10	no	no
Newton and Sulman [41]	Education/adherence	9	yesa	no	yes	no
Premkumar et al [42]	Monitoring	42	yesa	0-10	no	no
Yahanda et al [34]	Adherence/monitoring	15	yesa	0-9	no	yes

^aNo specific information about the type of opioid used given.