Bioequivalence and Bioavailability Forum • Leads to a (pseudo-) period effect ?

Leads to a (pseudo-) period effect ? [Bioanalytics]

posted by Ohlbe – France, 2019-09-19 15:50 (573 d 00:55 ago) – Posting: # 20620
Views: 4,285

Dear Helmut,

» However, if Ravuri would have different responses in his approach, they would show up in the ANOVA as a period effect – which is automatically corrected for and thus not relevant in assessing the treatment effect.

Would they really ? I would say yes if he had systematically a negative bias for period 1 and a positive bias for period 2, or vice-versa. As there will not be a single run for Period 1 samples and a single run for period 2 samples, that will not necessarily be the case: some subjects will get artificially a positive bias in P1, others in P2.

—
Regards
Ohlbe

Complete thread:

Crossover: samples of p1 and p2 in different batches? Ravuri sindhura 2019-09-18 19:16 [Bioanalytics]
- Crossover: samples of p1 and p2 in different batches? dshah 2019-09-19 09:16
  - Leads to a (pseudo-) period effect Helmut 2019-09-19 15:33
    - Leads to a (pseudo-) period effect ?Ohlbe 2019-09-19 15:50
      - Leads to a (pseudo-) period effect ? Helmut 2019-09-19 15:59
        
        Leads to a (pseudo-) period effect ? nobody 2019-09-19 16:21
        
        Almost entirely OT Helmut 2019-09-19 17:22
        
        Almost entirely OT nobody 2019-09-19 17:46
        
        Completely OT Helmut 2019-09-19 18:08
        
        Leads to a (pseudo-) period effect ? dshah 2019-09-20 07:52
        
        Leads to a (pseudo-) period effect ? nobody 2019-09-20 08:00
        Run ≠ batch? Helmut 2019-09-20 09:42
        
        Run ≠ batch Ohlbe 2019-09-20 10:37
        Run ≠ batch? dshah 2019-09-23 07:43
        
        Run ≠ batch? nobody 2019-09-23 08:36
    - Leads to a (pseudo-) period effect Ravuri sindhura 2019-09-23 13:04