# Vijay Narayan

## Activity

• Vijay Narayan started the topic in the forum Six Sigma Podcast 2 years, 1 month ago

Hi,
For a study I’m planning, I’m not sure of the right way to measure association and/or correlation between 2 variables, where one is a continuous variable (dependent), and the other is dichotomous categorical independent variable (independent).

The study looks at the relationship between ‘amount of time (# days) it takes for a pat…[Read more]

• Vijay Narayan started the topic in the forum Money Belt 2 years, 1 month ago

Hi,
For a study in Uganda, I’m struggling to figure out a good way to measure association and/or correlation between 2 variables (continuous dependent variable, and dichotomous categorical independent variable).

The study looks at the relationship between ‘amount of time (# days) it takes for a patient’s blood sample to be processed by the…[Read more]

• Vijay Narayan replied to the topic in the forum Vijay Narayan 2 years, 3 months ago

Thanks very much- this makes sense and is really helpful.

• Vijay Narayan replied to the topic in the forum Vijay Narayan 2 years, 3 months ago

I forgot to include that info, thanks @rbutler. The significant change in return rate would be 8% in this case (i.e. increasing from 57% in the baseline to 65% post-intervention). Given this, what approach could be used to calculate minimum sample size for the evaluation for alpha=.05 and 80% power?

• Vijay Narayan replied to the topic in the forum Vijay Narayan 2 years, 3 months ago

I forgot to include that info, thanks. The significant change in return rate would be 8% in this case (i.e. increasing from 57% in the baseline to 65% post-intervention). Given this, what approach could be used to calculate minimum sample size for the evaluation for alpha=.05 and 80% power?

• Vijay Narayan started the topic in the forum Hidden Factory 2 years, 3 months ago

Hi, I am planning to do a post-intervention evaluation study and struggling with how to determine the minimum sample size needed. The study is about retention of HIV+ pediatric patients in chronic care after they are diagnosed. The most important variable is percentage of HIV+ children patients who come back to the clinic for treatment one month…[Read more]

• Vijay Narayan became a registered member 2 years, 3 months ago