. Author manuscript; available in PMC: 2008 Jun 25.

Published in final edited form as: Am J Prev Med. 2007 Jun;32(6):517–524. doi: 10.1016/j.amepre.2007.02.024

Table 5.

Procedures performed on the skin^a

Period in months (randomization=0)	Patients with procedures % (n)			Difference % (95% CI)	Cost per participant ($)
	Skin exam.	Diet	p		Skin	Diet	p^b
−6 to 0	6.0% (41)	5.2% (35)	0 .6	0.7 (−1.7, 3.2)	12.92	13.32	0.5
0 to 6	8.0% (55)	3.6% (24)	0.0005	4.4 (1.9, 6.9)	16.81	4.96	0.0005
6 to 12	3.9% (27)	3.3% (22)	0.5	0.6 (−1.4, 2.6)	7.62	9.22	0.6

based on intent to treat analysis

p-value calculated using Wilcoxon 2-sample test

CI, confidence interval