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Table 2 Incidence of HIZ on lumbar MR images in various age groups (n = 637)

From: Factors associated with lumbar disc high-intensity zone (HIZ) on T2-weighted magnetic resonance image: a retrospective study of 3185 discs in 637 patients

Age group (years) HIZ Total
Present Absent Incidence rate (%)
< 20 3 23 11.54 26
20–29 4 47 7.84 51
30–39 28 63 30.77 91
40–49 55 99 35.71 154
50–59 54 88 38.03 142
60–69 33 54 37.93 87
70–79 20 53 27.40 73
> = 80 4 9 30.77 13
  1. χ2 = 24.340, P = 0.001