Table 1: Comparisons of demographic and clinical characteristics among the four groups.

VariablesNormal controlRight colorectal polypsLeft colorectal polypsBoth right and left polyps value
112385341

Age (years) 0.101
Female ( )173750.717
Hyperplastic polyp ( )71531.000
Tubular adenoma ( )3035331.000
Tubulovillous adenoma ( )1331.000
BMI (kg/m2) 0.034
Hypertension ( )3291190.520
SBP (mmHg) 0.889
DBP (mmHg) 0.867
CEA (ng/mL) 0.699
CA19-9 (U/mL) 0.397
Total cholesterol (mmol/L) 0.000
Triglycerides (mmol/L) 0.000
Fasting glucose (mmol/L) 0.141
Creatinine (umol/L) 0.002
Urinary nitrogen (mmol/L) 0.026

Data are presented as mean ± SD unless otherwise indicated. BMI: body mass index; SBP: systolic blood pressure; DBP: diastolic blood pressure; CEA: carcinoembryonic antigen; CA19-9: carbohydrate antigen 19-9.
aSignificantly different from normal control group ( ). bSignificantly different from normal control group ( ). cSignificantly different from right colorectal polyps group ( ). dSignificantly different from right colorectal polyps group ( ). eSignificantly different from left colorectal polyps group ( ).