Repeated Measures ANOVA Rogaine for Hair Growth in Women V.H. Price and E. Menefee (1990). “Quantitative Estimation of Hair Growth I. Androgenic Alopecia.

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Presentation transcript:

Repeated Measures ANOVA Rogaine for Hair Growth in Women V.H. Price and E. Menefee (1990). “Quantitative Estimation of Hair Growth I. Androgenic Alopecia in Women: Effect of Minoxidil,” The journal of Investigative Dermatology, Vol.95, pp

Data Description Subjects: 8 Women with Androgenetic Alopecia Treatments: Minoxidil (Rogaine) and Placebo (4 Women per treatment) Time Periods: Measurements made Pre- treatment (0 weeks), 8, 16, 24, and 32 weeks (will only consider post-treatment measures)

Data

Statistical Model

Sums of Squares

ANOVA Table/F-Tests Note: We cannot conclude any treatment or time effects or interaction at the 0.05 significance level. The subject-to-subject variation is very large, which makes finding a treatment effect very difficult in this setting (and very few subjects as well)

Post-Hoc comparisons* * Bonferroni’s method for illustration only (no significant effects found from Analysis of Variance)