Table 2.

Sample length for daily, weekly, and monthly aggregation.

Cohort	Effective Length	Actual Length	Missing Data	Aggregation Irregularities
	NE	N	ID (%)	n (%)
Daily Aggregation
1	350	348	2 (0.6)	--
2	350	345	5 (1.4)	--
3	350	344	6 (1.7)	--
4	350	348	2 (0.6)	--
Weekly Aggregation
1	50	50	0 (0.0)	0 (0.0)
2	50	50	0 (0.0)	1 (2.0)
3	50	50	0 (0.0)	1 (2.0)
4	50	50	0 (0.0)	0 (0.0)
Monthly Aggregation
1	13	13	0 (0.0)	1 (7.7)
2	13	13	0 (0.0)	1 (7.7)
3	13	13	0 (0.0)	1 (7.7)
4	13	13	0 (0.0)	1 (7.7)