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Table 1 Participant characteristics

From: Influence of menstrual cycle phase on resting-state functional connectivity in naturally cycling, cigarette-dependent women

  All N = 38 Follicular phase n = 22 Luteal phase n = 16 p
Demographics
 Age 33.9 ± 1.7 32.4 ± 2.3 35.9 ± 2.5 0.31
 African American (n), % 50.0 (19) 50.0 (11) 50.0 (8) 1.00
 Years of education 14.4 ± 0.3 14.4 ± 1.8 14.5 ± 2.6 0.90
Smoking characteristics
 Cigarettes per day 12.6 ± 0.7 11.5 ± 0.9 13.9 ± 1.1 0.12
 Years smoking 14.6 ± 1.8 12.7 ± 2.4 17.3 ± 2.5 0.21
 Pack yearsa 10.3 ± 1.5 8.6 ± 2.0 12.7 ± 2.3 0.20
 FTND scores 4.4 ± 0.3 4.1 ± 0.3 4.9 ± 0.4 0.13
  1. FTND Fagerström test for nicotine dependence, FTND scores ranged from 1 to 9
  2. aPack years calculation: cigarettes per day (÷) cigarettes in a pack (×) years smoking