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Table 1 Demographic features of patients with chronic hepatitis C treated with interferon (IFN) in nine regions of Japan

From: Regional disparities in interferon therapy for chronic hepatitis C in Japan: a nationwide retrospective cohort study

  All Hokkaido/Tohoku Kanto Shin-etsu Hokuriku Tokai Kinki Chugoku Shikoku Kyushu P-value
n 16854 2055 1142 781 1046 1170 3565 2599 716 3780  
Age (years)a 57.9 ± 10.9 56.9 ± 10.5 56.5 ± 11.3 59.4 ± 10.1 60.2 ± 9.3 58.7 ± 10.4 57.3 ± 11.6 59.3 ± 10.7 57.8 ± 10.1 57.5 ± 11.1 <0.001b
The elderly (≥65 years) (%) 30.2 26.1 24.9 34.4 35.3 32.5 29.9 34.9 26.7 28.7 <0.001c
Gender male (%) 50.4 50.6 53.3 46.7 44.3 48.8 51.5 49.7 54.6 51.2 <0.001c
IFN-experienced cases (%) 25.2 25.4 18.8 26.1 28.7 22.3 23.7 28.8 31.2 24.4 <0.001c
HCV Genotype 1/2/3/undetermined (%) 63.5/34.7/ 0.2/1.7 64.2/32.8/ 0.0/2.9 56.4/42.0/ 0.1/1.5 68.5/29.4/ 0.0/2.1 67.3/30.9/0.0/1.8 63.1/35.1/ 0.2/1.6 65.0/32.1/ 0.4/2.5 64.2/34.9/ 0.4/0.5 56.7/41.9/ 0.1/1.3 62.5/36.4/ 0.0/1.0 <0.001c
  1. aAge is shown as mean ± standard deviation
  2. bKruskal–Wallis analysis
  3. cPearson’s χ2 test
  4. IFN, Interferon; HCV, Hepatitis C virus