# Table 2

Variables associated with mean size of largest polyp (mm) in each age group of patients.*

Age Group

Variable

< 50 n = 3097

50-59 n = 22859

60-69 n = 14913

70-79 n = 6991

80 + n = 1087

Gender

Male

5.88 (5.72-6.0)**

6.1 (6.04-6.16)

6.64 (6.56-6.72)

6.88 (6.76-7.00)

7.45 (7.08-7.82)

Female

5.74 (5.56-5.92)

5.76 (5.69-5.83)

6.15 (6.06-6.24)

6.64 (6.51-6.77)

7.03 (6.68-7.38)

Site

5.43 (5.07-5.79)

5.62 (5.47-5.77)

6.03 (5.83-6.23)

6.18 (5.92-6.44)

6.70 (5.83-7.57)

Community/HMO

5.88 (5.75-6.01)

5.99 (5.94-6.04)

6.51 (6.44-6.58)

6.87 (6.77-6.97)

7.27 (7.00-7.54)

VA/Military

5.68 (5.28-6.08)

5.98 (5.85-6.11)

6.28 (6.12-6.44)

6.60 (6.27-6.93)

7.60 (6.37-8.83)

Race

White

5.77 (5.65-5.89)

5.93 (5.89-5.97)

6.40 (6.34-6.46)

6.74 (6.65-6.83)

7.19 (6.94-7.44)

Black

6.63 (5.95-7.31)

6.46 (6.26-6.66)

7.21 (6.89-7.53)

7.66 (7.09-8.23)

9.05 (6.94-11.16)

Polyp location

Distal

5.60 (5.46-5.74)

5.79 (5.73-5.85)

6.19 (6.12-6.26)

6.54 (6.42-6.66)

6.91 (6.58-7.24)

Proximal

6.18 (5.98-6.38)

6.20 (6.13-6.27)

6.75 (6.66-6.84)

7.02 (6.88-7.16)

7.55 (7.17-7.93)

Number of polyps

Single

5.12 (5.00-5.24)

5.21 (5.16-5.26)

5.53 (5.47-5.59)

5.85 (5.75-5.95)

6.29 (6.01-6.57)

Multiple

7.52 (7.25-7.79)

7.58 (7.49-7.67)

8.10 (7.99-8.21)

8.44 (8.27-8.61)

9.02 (8.54-9.50)

Family history

Negative

5.80 (5.53-6.07)

5.93 (5.88-5.98)

6.43 (6.36-6.50)

6.84 (6.74-6.94)

7.29 (7.01-7.57)

Positive

5.82 (5.69-5.89)

6.07 (5.97-6.17)

6.50 (6.37-6.63)

6.49 (6.29-6.69)

7.04 (6.47-7.61)

All patients

5.82 (5.70-5.94)

5.96 (5.92-6.00)

6.44 (6.38-6.50)

6.78 (6.69-6.87)

7.25 (7.00-7.50)

*Group data are based upon averages of the single largest polyp in millimeters detected in each individual patient in that group. **Numbers in brackets = 95% confidence interval.

Lowenfels et al. BMC Gastroenterology 2011 11:101   doi:10.1186/1471-230X-11-101