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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).