Table 6.

Classification table for McNemar analysis

	After enrollment	Before enrollment		Total	P
		At risk	Not at risk
All ages	At risk	44	12	56
	Not at risk	29	38	67
	Total	73	50	123	0.0079

	After enrollment	Before enrollment		Total	P
		At risk	Not at risk
≥ 18	At risk	29	6	35
	Not at risk	22	28	50
	Total	51	34	85	0.0025

	After enrollment	Before enrollment		Total	P
		At risk	Not at risk
< 18	At risk	15	6	21
	Not at risk	7	10	17
	Total	22	16	38	0.7815