Table 4.

Summary of exposure

	N**	SMP measured	Self reported
		Mean (SD*)***	Mean(SD)
Number of calls	59	2.4(1.3)	1.9(1.1)
Duration of calls	59	3.9(0.9)	4.9(2.2)
		Median(95% CI ‡)***
Number of calls	59	2.3(1.6, 2.5)	2.1(1.7, 2.4)
Duration of calls	59	3.8(3.5, 4.2)	5.2(4.8, 5.7)

** Number of participants in the study

* Standard deviation

‡ 95% confidence interval

***Log transformed data