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Table 3 ANOVA of fixed effects for industry in-dwelling catheter studies for Aβ40 and Aβ42

From: An integrated multi-study analysis of intra-subject variability in cerebrospinal fluid amyloid-β concentrations collected by lumbar puncture and indwelling lumbar catheter

  Aβ40 Aβ42
Effect F value (df1, df2) p value F value (df1, df2) p value
Age group 0.78 (2,156) 0.46 1.75 (2, 38.5) 0.19
Draw group 9.76 (2, 62.3) 0.0002* 11.07 (2, 15.1) 0.001*
Sponsor 0.94 (3, 137) 0.42 0.85 (3, 112) 0.47
Time 23.3 (1, 145) <0.0001* 19.66 (1, 43.7) <0.0001*
Time × draw group 11.55 (2, 139) <0.0001* 8.5 (2, 22.3) 0.0018*
  1. ANOVA analysis of variance, df degrees of freedom
  2. *p < 0.05