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Table 1 ANOVA, contacts in quarter-2 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 3.83 27.91 < 0.0001
Error 9,377 0.14   
Gender 1 0.07 0.50 0.4773
Case/control 1 14.08 102.55 < 0.0001
Quarter 1 0.30 2.21 0.1376
Case/control*Quarter 1 0.43 3.12 0.0775
  1. 3,310 cases and 3,310 controls
  2. Dependent variable: Number of contacts per quarter, logarithm
  3. Effect size adjusted R2 = 0.0113
  4. * linking two independent variables is to indicate their interaction term included in the ANOVA modelling equation