Skip to main content

Table 2 Comparison of corns that were healed and improved over 12 months by group

From: The effectiveness of salicylic acid plasters compared with ‘usual’ scalpel debridement of corns: a randomised controlled trial

  Corn Plaster Scalpel Difference
  (n = 101) (n = 101)   
No (%) with completely healed index corn*    OR (95% CI)*** P
3 months 32/95 (34%) 20/94 (21%) 2.00 (1.02,3.93) 0.044
6 months 27/74 (36%) 24/80 (30%) 1.59 (0.76,3.32) 0.215
9 months 18/55 (33%) 22/64 (34%) 0.99 (0.44,2.20) 0.973
12 months 20/43 (47%) 16/51 (31%) 1.94 (0.78,4.79) 0.153
No (%) with improved index corn**    OR (95% CI)*** P
3 months 79/95 (83%) 53/94 (56%) 4.42 (2.17,8.97) <0.001
6 months 62/74 (84%) 54/80 (68%) 2.74 (1.19,6.28) 0.017
9 months 44/55 (80%) 49/64 (77%) 1.24 (0.48,3.25) 0.655
12 months 33/43 (77%) 39/51 (76%) 0.97 (0.34,2.75) 0.948
Mean (SD) size of index corn (mm)    Mean diff. (95% CI)**** P
Baseline 3.9 (1.7) 3.8 (1.8)   
3 months 1.7 (1.6) 2.7 (2.3) −1.0 (−1.5, 0.5) <0.001
6 months 1.7 (1.6) 2.4 (2.2) −0.7 (−1.2, -0.2) 0.006
9 months 1.7 (1.6) 2.2 (2.1) −0.5 (−1.2, 0.1) 0.107
12 months 1.3 (1.5) 2.3 (2.2) −1.0 (−1.7, -0.2) 0.010
  1. *Defined as a corn size <1 mm. ** Defined as a reduction from baseline in corn size.
  2. ***From logistic regression, adjusted for centre and baseline corn size.
  3. ****From analysis of covariance on change from baseline, adjusted for centre and baseline corn size.