Complications on both sides roughly balanced out, and there was no significant difference in deaths between the two approaches.

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Several epidemiological studies showed there was no significant difference between people who take supplements and those who do not, said Anding, a registered dietitian and director of sports nutrition at Texas Children's Hospital.

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Three-quarters of the patients who took medicine still had angioplasty, compared with less than half of those who received stents, but there was no significant difference in how many deaths and heart attacks were prevented.

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Earlier data suggested any effect might be more prominent among MSM, but while they found MSM to be significantly more likely to find sex partners online, there was no significant difference in infection rates between MSM and other groups.

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In both cases men (who are hairier than women, as measured by the density of follicles and the length of the vellus hair) were better off than women when the bugs were released on unshaven patches of skin, though there was no significant difference between the sexes when they were shaved.

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There was no statistically significant difference in the development of FDA-defined valve abnormalities between Belviq and placebo-treated patients.

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But the most scientifically credible study of the effects of Medicaid, based on randomly assigning 10, 000 people to Medicaid coverage in Oregon, found there was no statistically significant difference in ER use between those newly enrolled in Medicaid relative to the (largely uninsured) comparison group.

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