Musclin Is Related to Insulin Resistance and Body Composition, but Not to Body Mass Index or Cardiorespiratory Capacity in Adults.

There are also at least three reasons to argue against the possibility that the lack of correlations between musclin and cardiorespiratory capacity variables arose due to insufficient power: (1) the multiple regression model had a very high P value, and even after adjustments the 95% confidence interval remained centered on zero; (2) none of the correlations showed a trend, which further suggests that type I errors were not present; and (3) several known correlations reported in Fig. 4 were significant, and the most obese subjects showed the worst cardiorespiratory capacity as expected, serving as quality controls and demonstrating that the sample was adequate.

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