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Table 1 Patient baseline characteristics

From: Narrow-band imaging and high-definition white-light endoscopy in patients with serrated lesions not fulfilling criteria for serrated polyposis syndrome: a randomized controlled trial with tandem colonoscopy

Total number of patients (n)

41

Mean age, years (SD)

59.6 (8.6)

Male sex (%)

53.7

BMI (Kg/m2, SD)

26.9 (4.2)

Diabetes mellitus (n, %)

4 (9.8)

Smoking habits (n, %)

 Non-smokers

16 (39.0)

 Former smoker

11 (26.8)

 Current smoker

14 (34.2)

 Smoking pack-years (median, IQR)

17.5 (14–31)

Comorbidities (n, %)

 None

21 (51.2)

 Obesity

2 (4.9)

 Cardiovascular

9 (22.0)

 Respiratory

4 (9.8)

 Any cancer

2 (4.9)

 Multiple pathology

3 (7.3)

Family history of CRC (n, %)

12 (29.3)

Personal history of CRC (n, %)

0

Personal history of abdominal surgery (n, %)

17 (41.5)

Colonoscopy indication (n, %)

 CRC screening

19 (46.3)

 Surveillance for colonic neoplasia

10 (24.4)

 Diagnosis or clinical symptoms

6 (14.6)

 Family history of CRC screening

5 (12.2)

 Therapeutic colonoscopy

1 (2.4)

Baseline inclusion criteria (n, %) a

 One or more serrated polyp larger than 10 mm

26 (63.4)

 Three or more serrated polyps

15 (36.6)

Type of colonoscope at baseline examination

 165 Olympus series

4 (9.8)

 180 Olympus series

14 (34.1)

 190 Olympus series

23 (56.1)

Mean time from baseline to colonoscopy review (months, 95% CI)

6.7 (5.2–8.3)

  1. BMI body mass index, SD standard deviation, IQR interquartile range, CRC colorectal cancer, CI confidence interval
  2. aAll polyps were proximal to the sigmoid colon