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Table 2 ANOVA, contacts in quarter-6 vs. quarter-1

From: Does an increase in visits to general practice indicate a malignancy?

Source df Mean square F statistic Pr > F
Model 4 3.24 24.19 < 0,0001
Error 7,852 0.31   
Gender 1 0.10 0.77 0,3787
Case/control 1 7.95 59.32 < 0,0001
Quarter 1 0.86 6.38 0,0115
Case/control*Quarter 1 1.20 8.95 0,0028
  1. 3,310 cases and 3,310 controls
  2. Dependent variable: Number of contacts per quarter, logarithm
  3. Effect size adjusted R2 = 0,0117
  4. * linking two independent variables is to indicate their interaction term included in the ANOVA modelling equation