Zad Rafi (Sir Panda)
@lesslikely.com
Agnostic statistician (frequentist, bayesian, likelihoodist, fiducial) | Posts about statistics in medicine at http://lesslikely.com | | #StatsTwitter • #EpiTwitter • #RStats
Reposted by Zad Rafi (Sir Panda)
When planning for drop outs: If you need n patients and expect some proportion x to drop out, you don't inflate n by 1.x but rather divide by 1-x.
Example: n = 200 and expected 20% drop out
200 * 1.20 = 240 (incorrect, as 80% of 240 = 192)
200 / 0.8 = 250 (correct, as 80% of 250 = 200)
Example: n = 200 and expected 20% drop out
200 * 1.20 = 240 (incorrect, as 80% of 240 = 192)
200 / 0.8 = 250 (correct, as 80% of 250 = 200)
June 9, 2025 at 8:50 AM
When planning for drop outs: If you need n patients and expect some proportion x to drop out, you don't inflate n by 1.x but rather divide by 1-x.
Example: n = 200 and expected 20% drop out
200 * 1.20 = 240 (incorrect, as 80% of 240 = 192)
200 / 0.8 = 250 (correct, as 80% of 250 = 200)
Example: n = 200 and expected 20% drop out
200 * 1.20 = 240 (incorrect, as 80% of 240 = 192)
200 / 0.8 = 250 (correct, as 80% of 250 = 200)
Naturally the only thing to do after seeing this is to suggest that you actually test whether randomization has succeeded via a statistical test for balance, and if it’s not, just rerandomize forever until you achieve perfect balance and the holy p =1
June 6, 2025 at 12:39 PM
Naturally the only thing to do after seeing this is to suggest that you actually test whether randomization has succeeded via a statistical test for balance, and if it’s not, just rerandomize forever until you achieve perfect balance and the holy p =1
Reposted by Zad Rafi (Sir Panda)
Reposted by Zad Rafi (Sir Panda)
RIP Edward Leamer. Specification Searches was ahead of its time
March 2, 2025 at 6:51 PM
RIP Edward Leamer. Specification Searches was ahead of its time
Reposted by Zad Rafi (Sir Panda)
Nice summary of our recent paper on SMOTE w/ @alcarriero.bsky.social @benvancalster.bsky.social
March 6, 2025 at 1:40 PM
Nice summary of our recent paper on SMOTE w/ @alcarriero.bsky.social @benvancalster.bsky.social
RIP Edward Leamer. Specification Searches was ahead of its time
March 2, 2025 at 6:51 PM
RIP Edward Leamer. Specification Searches was ahead of its time
Reposted by Zad Rafi (Sir Panda)
My work on network regression and mediation in latent space models is now published at JMLR!
jmlr.org/papers/v26/2...
jmlr.org/papers/v26/2...
February 10, 2025 at 11:30 PM
My work on network regression and mediation in latent space models is now published at JMLR!
jmlr.org/papers/v26/2...
jmlr.org/papers/v26/2...