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. 2014 Aug 19;11(1):178–184. doi: 10.4161/hv.34421

Table 2. Cases of herpes zoster (HZ) and cases evolving to postherpetic neuralgia (PHN) by age.

Age group (in years) Cases of HZ Cases of HZ that evolved to PHN
Cases Proportion
0–9 13 - -
10–19 29 - -
20–29 6 - -
30–39 16 - -
40–49 31 1 3.23%
50–59 57 7 12.28%
60–69 67 8 11.94%
≥ 70 114 20 17.54%
≥ 50 238 35 14.71%
All ages 333 36 10.81%

Source: Case series of patients diagnosed in 10 basic health areas for which the Hospital del Sagrado Corazón de Barcelona serves as the reference center.