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Table 3 Correlation coefficiency between thpfe amount of smoking and levels of craving for smoking, depression, and menstrual phase-associated symptoms 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 Follicular Luteal
   r 95% CI r 95% CI r 95% CI
Craving (VAS) Number of cigarettes 0.611*** 0.20–0.84 0.598*** 0.18–0.83 0.718*** 0.38–0.89
CO concentration 0.530** 0.09–0.80 0.430* 0.08–0.69 0.811*** 0.55–0.93
Depressiveness (CES-D) Number of cigarettes 0.387* 0.02–0.66 0.374* 0.01–0.65 0.546** 0.24–0.77
CO concentration 0.490** 0.03–0.78 0.484** 0.02–0.78 0.607*** 0.20–0.84
Menstrual phase-associated symptoms(MDQ) Number of cigarettes 0.405* 0.05–0.67 0.097 −0.28–0.45 0.530** 0.08–0.80
  CO concentration 0.488** 0.03–0.78 0.274 −0.10–0.58 0.588** 0.17–0.83
  1. * p < 0.05, ** p < 0.01,*** p < 0.001.
  2. 95% CI: 95% confidence interval.