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Table 2 Variables associated with mean size of largest polyp (mm) in each age group of patients.*

From: Determinants of polyp Size in patients undergoing screening colonoscopy

  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      
   Academic 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)
  1. *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.