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Table 1 Prevalence of HAV antibodies according to age groups. Catalonia, 1989, 1996 and 2002.

From: Declining hepatitis A seroprevalence in adults in Catalonia (Spain): a population-based study

Age groups 1989 Prevalence   1996 Prevalence   2002 Prevalence  
  % (95%CI) n % (95%CI) n % (95% CI) n
15–24 43.1 (31.4–55.3) 72 31.42 (23.1–40.5) 118 15.42 (9.8–22.6) 136
25–34 82.11 (72.3–89.6) 84 56.91,3 (50.1–63.6) 216 34.93 (28.7–41.6) 223
35–44 93.8 (88.1–97.3) 129 86.94 (81.8–91.1) 222 75.14 (69.4–80.1) 265
45–54 95.4 (89.5–98.5) 108 95.5 (91.9–97.8) 222 93.8 (90.3–96.4) 276
55–64 91.0 (82.4–96.3) 78 99.1 (96.8–99.9) 224 97.3 (94.3–99.0) 224
>64 96.1 (90.3–98.9) 102 98.8 (96.6–99.8) 257 98.2 (94.9–99.6) 168
TOTAL* 84.34 (81.3–87.3) 573 77.8 4,1 (75.5–80.1) 1259 68.21 (65.7–70.7) 1292
  1. 1p < 0.0001 2p = 0.004 3p < 0.0001 4p = 0.002
  2. * Standardized by age and sex