One must consider the confidence intervals and p value (where provided) to determine significance. First, presence of a positive OR for an outcome given a particular exposure does not necessarily indicate that this association is statistically significant. This example illustrates a few important points. Interestingly, the odds of persistent suicidal behaviour in this group given presence of borderline personality disorder at baseline was twice that of depression (OR 3.8, 95% CI:1.6–8.7), and was statistically significant (p 0.002) In fact, this is indicated in Table 1 of the reference article, which shows a p value of 0.07.
Since the 95% CI of 0.96 to 2.80 spans 1.0, the increased odds (OR 1.63) of persistent suicidal behaviour among adolescents with depression at baseline does not reach statistical significance.
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