Table 1.

Stratification of healthcare facilities

Number of transfers (during the sample period)	Representation of total number of transfers during entire study period	Ideal relative number of facilities to be sampled (out of 10)	Total number of facilities in sampling frame	Number of teaching facilities to be sampled	Number of community facilities to be sampled	Number of nursing homes/long term care facilities to be sampled
Large volume senders (more than 1,000 patient transfers during the sample period)	50%	5	20	2	2	0*
Medium volume senders (between 400 and 999 patient transfers during the sample period)	21%	2	11	1	1	1
Small volume senders (between 1 and 399 transfers during the sample period)	29%	3	152	1	1	1

*No available facilities