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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Int J Cancer. 2018 Dec 11;144(7):1561–1573. doi: 10.1002/ijc.31869

Table 1.

Distribution of age at diagnosis, gender, adenoma location, histology, size and observation time of patients with primary adenomas without recurrence and with recurrence.

Primary adenomas w/o recurrence Primary adenomas w/ recurrence
Variable (n=15) (n=29) p-value
Age at diagnosis (y)
 Mean ± SD 65.0 ± 6.3 66.6 ± 11.7 0.633a
 Median (IQR) 66.7 (63.9-68.5) 68.2 (57.4-72.9)
Gender
 Female 4 14 0.208b
 Male 11 15
Location
 Right hemicolon 9 14 0.774c
 Left hemicolon 3 6
 Rectum 3 9
Histology
 Tubular 5 3 0.099b
 Tubulo-villous / Villous 10 26
Size (mm)
 Mean ± SD 22.8 ± 9.7 32.5 ± 20.2 0.086a
 Median (IQR) 20.0 (15.0-30.0) 27.5 (20.0-40.0)
Observation time/recurrence-free time (m)
 Mean ± SD 25.4 ± 14.4 21.7 ± 19.5 0.528a
 Median (IQR) 21.9 (12.5-38.0) 17.2 (8.2-25.7)
a

Student t test;

b

Fisher exact test;

c

Freeman-Halton test