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Table 1 Testing of overall differences of mean relative proliferation among different treatment groups as well as at each pre-specified time by using one-way Analysis of Variance (one-way ANOVA) with Bonferroni correction for pairwise group comparisons.

From: Non-monotonic changes in clonogenic cell survival induced by disulphonated aluminum phthalocyanine photodynamic treatment in a human glioma cell line

  Pairwise Comparison Mean Difference (Estimate [Standard Error]) P-value**
Overall    0.0001*
  1 μM vs. control -0.8192 (0.4673) 0.0923
  5 μM vs. control -2.6097 (0.4673) 0.0001
  5 μM vs. 1 μM -1.7904 (0.4673) 0.0008
19 h    0.0001*
  1 μM vs. control -0.3503 (0.3322) 0.3323
  5 μM vs. control -1.1040 (0.3322) 0.0159
  5 μM vs. 1 μM -0.7537 (0.3322) 0.0638
30 h    0.0001*
  1 μM vs. control -1.183 (0.1116) 0.0001
  5 μM vs. control -2.8440 (0.1116) 0.0001
  5 μM vs. 1 μM -1.6610 (0.1116) 0.0001
42 h    0.0001*
  1 μM vs. control -0.9243 (0.3034) 0.0226
  5 μM vs. control -3.8810 (0.3034) 0.0001
  5 μM vs. 1 μM -2.9567 (0.3034) 0.0001
  1. * overall group differences calculated by F-test from one-way ANOVA
  2. ** all the p-values noted as "*" should be compared with 5% and all others with 1.66% due to pairwise comparisons with Bonferroni correction.