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Table 1 Distribution of selected characteristics for the Cytology Sampling Study 2 in Linxian, China

From: Measuring telomere length for the early detection of precursor lesions of esophageal squamous cell carcinoma

Characteristics Normal (n = 92) Esophagitis (N = 50) Mild dysplasia (N = 37) Moderate dysplasia (N = 37) Severe dysplasia (N = 15)
Males, N (%) 43 (47) 12 (24) 17 (46) 16 (43) 7 (47)
Age, median years (Q1-Q3) 54 (51–57) 53 (51–57) 54 (51–58) 55 (53–57) 55 (52–57)
BMI, median (Q1-Q3) 23.5 (21.5-24.8) 23.2 (21.8-25.4) 23.1 (20.8-25.2) 22.7 (20.4-24.8) 24.5 (22.5-27.2)
Ever smoke cigarettes, N (%) 28 (30) 11 (22) 10 (27) 11 (30) 5 (33)
Drink alcohol, any, N (%) 11 (12) 2 (4) 2 (5) 2 (5) 1 (7)
Hypertension, yes, N (%) 64 (68) 34 (68) 30 (81) 27 (73) 11 (73)
Telomere lengtha, mean (SD) 0.92 (0.17) 0.90 (0.16) 0.96 (0.18) 0.95 (0.17) 0.97 (0.24)
Telomere lengtha, median (Q1-Q3)a 0.92 (0.78-1.05) 0.88 (0.80-1.00) 0.93 (0.84-1.06) 0.94 (0.82-1.09) 0.93 (0.85-0.98)
  1. aCalculated as telomeric DNA (T) divided by amount of single-copy control gene DNA (S) to produce the relative measurement of telomere length (T/S ratio).
  2. Abbreviations: SD, standard deviation; Q1, first quartile; Q3, third quartile; BMI, body mass index.