Describing Odds Ratios

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Describing Odds Ratios

Odds Ratio for Group A Compared to Another Group	Interpretations
.25	The odds of the outcome for Group A were 25% of the odds of the other group.
	The odds of the outcome for Group A were 75% lower than for the other group.
1.0	The odds of the outcome for Group A were equivalent to (the same as) the odds for the other group.
	There was no difference between Group A and the other group.
1.5	The odds of the outcome for Group A were 1.5 times those for the other group.
	The odds of the outcome for Group A were 50% higher than for the other group.
2.0	The odds of the outcome for Group A were 100% higher than those for the other group. (technically correct, but at the very least confusing?)
	The odds of the outcome for Group A were 2.0 (twice) those for the other group.
2.5	The odds of the outcome for Group A were 2.5 times those for the other group.
	The odds of the outcome for Group A were 150% higher than for the other group. (technically correct, but at the very least confusing?)