Table 7.

Overall effectiveness (unconditional) of media channels for demographic subgroups.

Characteristic		Success rate, %		Sample size, n			P value
		Email	SMS	Email	SMS
Age (years)
	50-55	11.0	8.4	32,836	16,801	<.001
	55-60	12.7	11.1	10,551	6846	.001
	60-65	12.0	11.0	11,220	7758	.03
	65-70	12.9	11.3	8356	6271	.003
	70-74	14.2	11.8	6773	5570	<.001
SESa
	1-3	11.1	8.1	3897	7093	<.001
	4-6	11.8	10.0	27,563	23,642	<.001
	7-10	12.2	11.5	38,174	12,433	.04
Gender
	Female	10.4	9.3	41,267	24,051	<.001
	Male	14.3	11.2	28,469	19,195	<.001
Overall		12.0	10.2	69,777	43,271	<.001

^aSES: socioeconomic status. This is an index defined by the Central Bureau of Statistics (CBS), ranging from 1 to 10, where 1 reflects the weakest status and 10 the highest.