Table 5.

Results of multilevel analysis (n = 751)

Descriptive variable	Regression coefficient	s.e.	P value	95% CI
Lag time (days) between onset and providing information	1·52	0·18	<0·01	1·16 to 1·88
STEC type (O26 Stx1 vs. O157 Stx1 and Stx2)	−10·34	1·67	<0·01	−13·62 to −7·06
Information provided face-to-face (vs. letter or telephone) to families with STEC-positive children (at initial response)	−19·15	1·67	<0·01	−23·60 to −14·70
Information provided face-to-face (vs. letter or telephone) to families with STEC-negative children (at initial response)	−8·35	4·55	<0·01	−11·91 to −5·36

s.e., Standard error; CI, confidence interval.