Eighty-one of 1037 participants had NDE (7.8%; CI 6.3-9.7%).

There were no  significant associations between NDE and age (p>0.6, t-test independent samples) or gender  (p>0.9, chi-square test). The only significant association was between NDE and migraine aura:  Forty-eight (6.1%) of 783 subjects without migraine aura and 33 (13.0%) of 254 subjects with migraine aura had NDE (p<0.001, chi-square test, odds ratio (OR) = 2.29). In multiple logistic migraine aura had NDE (p<0.001, chi-square test, odds ratio (OR) = 2.29). In multiple logistic  regression analysis, migraine aura remained significant after adjustment for age (p0.001, OR  2.31), gender (p<0.001, OR 2.33), or both (p<0.001, OR 2.33).