Table 9.

Synthesis of results: average effectiveness per outcome.

Outcome	Dimension	Number of studies/ population members	Average effectivenessa, %	Duration, %		Frequency, %
				Short (<1 month)	Long (≥1 month)		Highb	Lowc
Satisfaction	Information provided	7/1320	93	88	100		88	100
Satisfaction	Overall care	8/1915	64	72	52		72	52
Adherence	Instructions	8/2032	75	72	100		75	N/Ad
Adherence	Medication usage	3/541	84	N/A	84		50	100
Quality of life	Overall	7/1300	48	100	38		66	57
Clinical parameters	Physical functioning and pain	4/836	50	89	30		89	30
Clinical parameters	Clinical values	4/913	74	76	50		76	50
Clinical parameters	Symptoms	3/315	39	N/A	39		100	0
Health care economics	Overall	5/860	59	78	68		78	68
Knowledge	Overall	4/634	100	100	100		100	100
Average effect	N/A	N/A	69	82	69		78	64

^aAverage effectiveness is the weighted average of the population linked to an outcome and the part of the population with a positive effect on the outcome.

^bHigh frequency is >1 message per week, on average.

^cLow frequency is ≤1 message per week, on average.

^dN/A: not applicable.