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. Author manuscript; available in PMC: 2006 Dec 21.
Published in final edited form as: J Nutr. 2006 Jul;136(7):1896–1903. doi: 10.1093/jn/136.7.1896

TABLE 1.

Baseline characteristics of participants in the PPT-based cohort by adenoma recurrence1,2

Characteristic  Overall No recurrence Nonadvanced recurrence Advanced recurrence P-value nonadvanced3 P-value advanced4
Sample size, n 1905 1151  629 125 629/1151 125/1151
Age, y  61.1 (9.9)  59.9 (10.1)   62.3 (9.2)  60.8 (9.9) <0.0001 <0.0001
BMI, kg/m2  27.6 (3.9)  27.4 (4.0)   27.8 (3.8)  28.0 (4.1) 0.10  0.10 
Male gender, %  64  60   72  70   0.0001 0.02 
Caucasian, %  90  90   90  90 0.96  0.42 
Education ≤high school, %  25  24   25  28 0.67  0.35 
NSAID use, %  34  35   33  24 0.37  0.01 
Family history of colorectal cancer, %  27  27   26  26 0.73  0.96 
1

Values are means and SD for continuous variables and % for categorical variables, with P-values for differences in means determined by t test and differences in proportions determined by χ2 test.

2

Adenomatous polyp recurrence and advanced adenoma recurrence diagnosed through postintervention at y 4.

3

Comparison between nonadvanced adenoma recurrence group to no adenoma recurrence group.

4

Comparison between advanced adenoma recurrence group to no adenoma recurrence group.