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. 2017 Dec 1;18:534. doi: 10.1186/s12859-017-1949-5

Table 3.

Analysis of variance (ANOVA) with a blocking factor. Hypothetical data are used to demonstrate an ANOVA for four individuals serving as the replicates spread across two qPCR plates. The qPCR plates serve as a statistical blocking factor. * = expression ratio significantly different from 1

Biological replicate Group A ΔCq;r,Aw Group B ΔCq;r,Bw Group C ΔCq;r,Cw qPCR plate Bonferroni-adjusted P-value
r = 1 0.855 1.203 0.866 1
r = 2 0.711 1.056 0.799 1
r = 3 0.582 0.890 0.522 2
r = 4 0.699 0.775 0.669 2
Source Df MS F P
Group 2 0.096 12.864 0.003
Plate Blocking 1 0.153 20.487 0.002
Error 8 0.007
Post-hoc testing Mean Difference ΔΔCqw 95% C.I. for ΔΔCqw Expression Ratio 10∆∆Cqw 95% C.I. for 10∆∆Cqw
Group A vs. B −0.269 (−0.128, −0.410) 1.86 (1.34, 2.57) 0.007*
Group A vs. C −0.002 (0.139, −0.143) 1.00 (0.726, 1.39) 1.000
Group B vs. C 0.267 (0.408, 0.126) 0.54 (0.391, 0.748) 0.007*