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Table 4 Slope and significance for time × draw groups 1–3 interaction 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
Time × draw group Slope p value Slope p value
1 0.41 0.56 1.02 0.25
2 1.6 0.12 0.79 0.45
3 4.12 <0.001* 4.32 <0.001*
  1. *p < 0.05