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Table 3 Number and proportion of HFRS patients according to age group in each quarter

From: Epidemiologic study on changes in occurrence of hemorrhagic fever with renal syndrome in Republic of Korea for 17 years according to age group: 2001–2017

Age group

Quartersa

First quarter

Second quarter

Third quarter

Fourth quarter

Total (n, %)

719 (10.2)

725 (10.3)

952 (13.5)

4652 (66.0)

≤ 39 (n, %)

198 (15.7)†

173 (13.7)†

207 (16.4)*

683 (54.2)†

40~69 (n, %)

384 (10.1)

377 (9.9)

457 (12.0)†

2595 (68.1)†

≥ 70 (n, %)

137 (6.9)†

175 (8.9)*

288 (14.6)

1374 (69.6)†

  1. All statistical significance was analyzed by χ2 test or Fisher’s exact test, appropriately
  2. aThe periods of each quarter are as follows: first quarter (January to March), second quarter (May to June), third quarter (July to September), and fourth quarter (October to December)
  3. *P-value was less than 0.05, †P-value was less than 0.001
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BMC Infectious Diseases

ISSN: 1471-2334

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