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Table 3 Characteristics of smoking status of episodic cluster headache patients who were current and former smokers

From: Impact of continuing or quitting smoking on episodic cluster headache: a pilot survey

  Total (n = 162) Current smokers (n = 120) Former smokers (n = 42)
  Mean± SD Range Mean± SD Range Mean± SD Range
Age of onset of smoking (years) 17.04 ± 3 12 - 38 17.16 ± 3 12 - 38 16.71 ± 2 13 - 22
Length of smoking (years) 29.56 ± 11 2 - 55 30.75 ± 10a 11 - 49 26.19 ± 13 2 - 55
N. of cigarettes/day smoked at the onset of cluster headache 17.74 ± 8 1 - 60 17.50 ± 9 1 - 60 17.77 ± 6 6 - 30
N. of cigarettes/day smoked at the time of completing the questionnaire 16.98 ± 8 1 - 35 16.98 ± 8 1 - 35 0 0
  N % N % N %
Patients who start smoking before the onset of cluster headache 150 92.6 111 92.5 39 92.85
Changes in smoking during the active period       
Increased 14b 8.6 12b 10 2b 5
Decreased 74 45.7 58 48.3 16 40
Unchanged 74 45.7 50 41.7 24 55
  1. a Current vs. former smokers: P < 0.05, Student’s t-test for unpaired data; b Increased vs. decreased and vs. unchanged: P < 0.0001, Chi-square test with Bonferroni correction.