From the actual research article in the American Heart Journal:
Methods
Patients at 6 US hospitals were randomly assigned to 1 of 3 groups: 604 received intercessory prayer after being informed that they may or may not receive prayer; 597 did not receive intercessory prayer also after being informed that they may or may not receive prayer; and 601 received intercessory prayer after being informed they would receive prayer. Intercessory prayer was provided for 14 days, starting the night before CABG [coronary artery bypass graft]. The primary outcome was presence of any complication within 30 days of CABG. Secondary outcomes were any major event and mortality.
Results
In the 2 groups uncertain about receiving intercessory prayer, complications occurred in 52% of patients who received intercessory prayer versus 51% of those who did not. Complications occurred in 59% of patients certain of receiving intercessory prayer compared with the 52% of those uncertain of receiving intercessory prayer. Major events and 30-day mortality were similar across the 3 groups.
Conclusions
Intercessory prayer itself had no effect on complication-free recovery from CABG, but certainty of receiving intercessory prayer was associated with a higher incidence of complications.
"Patients who received prayers were marginally more likely to develop complications (52.5 to 50.9 percent) and substantially more likely to develop major complications (18.0 to 13.4 percent) than patients who received none."
Well, it would appear in this case, that "Goddidntdoit!"