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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