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Table 2 Amount of smoking (number of cigarettes smoked and CO concentration) in the menstrual, follicular and luteal phases

From: Association of menstrual phase with smoking behavior, mood and menstrual phase-associated symptoms among young Japanese women smokers

  Menstrual mean (SD) Follicular mean (SD) Luteal mean (SD) p-value partial η2
Number of cigarettes (per day) 16.1 (5.6) 14.7 (5.4)1) 18.3 (4.9)1) 0.007 0.081
Range 10.0–30.0 10.0–22.0 10.0–30.0  
CO concentration (ppm) 15.5 (5.8) 14.1 (6.8)2) 18.1 (5.1)2) 0.019 0.070
Range 3.7-28.0 4.0-30.0 11.0-36.0   
  1. 1) p = 0.028, 2) p = 0.034.
  2. Data were analyzed by one-way repeated measures ANOVA followed by Tukey’s multiple comparison test.