Table 4.

Number and size of the adenomas according to the fecal immunochemical test (50 ng/mL) result and location

Number of adenomas per patientNumber of adenomas distal to splenic flexureNumber of adenomas proximal to splenic flexure
Adenoma's characteristicsFecal hemoglobin concentrationMean ± SDP valueMean ± SDP valueMean ± SDP value
Maximum size (mm)<50 ng/mL (n = 403)6.2 ± 4.21<0.0010.58 ± 3.48<0.0015.84 ± 4.470.06
≥50 ng/mL (n = 71)13.2 ± 8.7112.25 ± 0.7710.03 ± 11.48
Adenomas (no.)<50 ng/mL (n = 403)1.76 ± 1.46<0.0011.1 ± 1.1<0.0010.66 ± 1.20.1
≥50 ng/mL (n = 71)3.03 ± 2.822 ± 1.951.03 ± 2.2
Advanced adenomas (no.)a<50 ng/mL (n = 403)0.28 ± 0.57<0.0010.18 ± 0.45<0.0010.1 ± 0.350.1
≥50 ng/mL (n = 71)1.06 ± 1.450.77 ± 0.940.28 ± 1.15
Villous histology (no.)<50 ng/mL (n = 403)0.1 ± 0.340.010.07 ± 0.290.0030.03 ± 0.180.2
≥50 ng/mL (n = 71)0.3 ± 0.620.2 ± 0.50.11 ± 0.57
High-grade dysplasia (no.)<50 ng/mL (n = 403)0.07 ± 0.330.020.05 ± 0.270.020.02 ± 0.150.6
≥50 ng/mL (n = 71)0.2 ± .0.430.17 ± 0.410.03 ± 0.16
Flat adenomas (no.)b<50 ng/mL (n = 403)0.49 ± 1.020.50.29 ± 0.70.040.2 ± 0.750.6
≥50 ng/mL (n = 71)0.41 ± 1.10.15 ± 0.50.25 ± 0.82
Flat advanced adenomas (no.)<50 ng/mL (n = 403)0.07 ± 0.280.70.02 ± 0.180.50.04 ± 0.220.4
≥50 ng/mL (n = 71)0.08 ± 0.370.01 ± 0.120.07 ± 0.35
Sessile adenomas (no)b<50 ng/mL (n = 403)0.97 ± 1.20.10.57 ± 0.870.10.39 ± 0.750.5
≥50 ng/mL (n = 71)1.34 ± 2.080.86 ± 1.750.48 ± 1.05
Sessile advanced<50 ng/mL (n = 403)0.1 ± 0.370.10.07 ± 0.30.20.03 ± 0.20.3
adenomas (no.)≥50 ng/mL (n = 71)0.2 ± 0.520.13 ± 0.440.07 ± 0.3
Pedunculated adenomas (no.)b<50 ng/mL (n = 403)0.27 ± 0.5<0.0010.2 ± 0.46<0.0010.06 ± 0.250.2
≥50 ng/mL (n = 71)1.25 ± 20.96 ± 1.030.3 ± 1.68
Pedunculated advanced adenomas (no.)<50 ng/mL (n = 403)0.11 ± 0.34<0.0010.09 ± 0.31<0.0010.02 ± 0.140.3
≥50 ng/mL (n = 71)0.76 ± 1.380.62 ± 0.820.14 ± 1.07

NOTE: Quantitative variables are expressed as mean and standard deviation. Differences between quantitative variables were analyzed with Student t test. Differences with P < 0.05 are considered statistically significant.

  • aAdvanced adenoma: adenoma >1 cm in size or with high-grade dysplasia or intramucosal carcinoma or with villous component (>20%).

  • bAdenoma morphology was classified according to Paris classification.