Table 6.

Multi-predictor model of mortality risk

Predictor	Odds ratio (95% CI)*	p value
Impact factor in 1993 (per unit of impact factor)	0.986 (0.96, 1.02)	0.37
Mortality is primary outcome	0.62 (0.31, 1.25)	0.18
Mortality in primary paper	1.25 (0.67, 2.33)	0.48
Centers, number	0.997 (0.98, 1.01)	0.64
Industry funding	0.93 (0.60, 1.43)	0.73
Peer review funding	1.08 (0.74, 1.59)	0.69
Random sequence	0.87 (0.59, 1.28)	0.47
Allocation concealed, clearly adequate (A) or not (BCD)	1.42 (0.91, 2.20)	0.12
Double-blind	0.76 (0.48, 1.21)	0.25
Analysis as randomized	0.96 (0.56, 1.64)	0.88
Sample size	1.000076 (0.99989, 1.00026)	0.43
Europe	0.95 (0.60, 1.49)	0.81
Asia	1.02 (0.43, 2.39)	0.97
Other non-USA/Canada	0.80 (0.38, 1.71)	0.57

CI confidence interval