Table 2 Baseline demographic characteristics of the study population
From: Botulinum toxin: could it be an effective treatment for chronic tension-type headache?
Variables | BTX-A | Placebo | P value | |
|---|---|---|---|---|
Age (years)a | 36.29 ± 7.75 | 36.86 ± 7.75 | 0.847 | |
Sex | ||||
M | 4 (28.6%) | 5 (35.7%) | 1.0 | |
F | 10 (71.4%) | 9 (64.3%) | ||
Smoking | ||||
Yes | 5 (35.7%) | 5 (35.7%) | 1.0 | |
No | 9 (64.3%) | 9 (64.3%) | ||
Contraceptive pills | 1/10 | 2/9 | 1.0 | |
Educational level | ||||
Secondary | 4 (28.6%) | 4 (28.6%) | 0.875 | |
University | 8 (57.1%) | 7 (50%) | ||
Higher level | 2 (14.3%) | 3 (21.4%) | ||