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Table 1 The basic characteristics of subjects in different groups (mean ± SD, median, interquartile range)

From: The levels of urine CTX-II, C2C, and PYD in children patients with Kashin-Beck disease in Qinghai Province of China

  N Sex (male/female) Age (years) BMI (kg/m2)
External control group 50 25/25 10.0 (8.0, 10.0) 16.01 ± 1.76
Internal control group 41 24/17 11.0 (10.0, 12.0) 16.68 ± 1.96
Case group 31 14/17 12.0 (10.0, 13.0) 16.15 ± 1.73
P value   0.709 0.000 0.249