Table 6.

Results of the hypothesis testing

Hypothesis	Description	Test result
1	shorter length of stay managed care	not confirmed
2	less variation length of stay managed care	confirmed
3	influence managed care at physician level	not confirmed
4	shorter length of stay, less variation when more managed care patients per physician	confirmed, not confirmed
5	shorter length of stay, less variation when more managed care patients per hospital	not confirmed, not confirmed
6	fewer insurers per physician, less variation in length of stay	confirmed
7	fewer insurers per hospital, less variation in length of stay	confirmed
8	fewer different hospitals per physician, less variation in length of stay	not confirmed
9	DRGs that can be standardized show less variation	confirmed