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Table 1 Clinical characteristics of both groups on entry into the study.

From: Botulinum toxin injection versus lateral internal sphincterotomy in the treatment of chronic anal fissure: a non-randomized controlled trial

Baseline characteristics BT (n = 10) LIS (n = 11)
Age (years) 41 ± 11 39 ± 10
Sex (female/male) 4/6 7/4
Symptom duration (months) 10 ± 6 11 ± 6
Maximal Resting Pressure (mmHg) 101 ± 23 104 ± 22
Maximal Squeeze Pressure (mmHg) † 70 ± 27 117 ± 62
  1. † p > 0.05 for the comparison between the two groups (by Mann-Whitney test).