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Table 3 Division of participants into smokers and non-smokers and into episodic and chronic cluster headaches

From: Effectiveness of medication in cluster headache

  Patientsa (N = 133)  
  Smokers Non-Smokers  
Frequency 78 (59%) 55 (41%) Statistic
Gender (male / female) 61 (78%) / 17 (22%) 39 (71%) / 16 (29%) χ2 = 0.92
p = 0.34
Age [y], mean ± SD 41.3 ± 10.2 43.7 ± 10.8 p = 0.20
CH – Type (episodic / chronic) 57 (73%) / 21 (27%) 41 (75%) / 14 (25%) χ2 = 0.04
p = 0.85
  Episodic Chronic  
Frequency 98 (74%) 35 (26%) Statistic
Gender (male / female) 74 (76%) / 24 (24%) 26 (74%) / 9 (26%) χ2 = 0.02
p = 0.89
Age [y], mean ± SD 41.7 ± 10.8 43.7 ± 9.5 p = 0.31
  1. aExcept for age