"Cold" X5 Hairlaser™ used to treat male androgenic alopecia and hair growth: an uncontrolled pilot study.

Subsequent, linear regression of mean hair counts at each time point was performed, and post-hoc analysis found an increasing trend of hair growth over time that was statistically significant (p-value < 0.0001) with the estimated slope of 1.406.

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Although the imputation helped to capture the marginal significance of the mean difference of hair counts over time for the Young group (p-value = 0.0295), a linear trend of the hair growth was still not detected (p-value = 0.1054) from the post-hoc analysis as in the complete data case.

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