Body weight.

<p>The weights (g) of wild-type mice and <i>Nfix</i>^+/− mice were recorded. There was weak evidence (<i>p</i> = 0.08) to suggest that male <i>Nfix⁺</i>^/− mice were on average heavier than male wild-type mice. There was no evidence that female <i>Nfix</i>^+/− mice were heavier than female wild-type mice. The age that mice were weighed at varied from P63–P73. To account for this source of variation, ‘age-at-weigh-in’ was added as a covariate during the statistical analysis of these data (<i>Nfix</i>^+/+, n = 20, 9 male, 11 female; <i>Nfix</i>^+/−, n = 26, 12 male, 14 female).