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Table 5 Poisson regression analysis for the effect of quarter on HFRS incidence

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

Relative risk (95% CI)

P-value

First quartera

Total

Reference

 

≤ 39

Reference

 

40~69

Reference

 

≥70

Reference

 

Second quartera

Total

1.008 (0.910–1.118)

0.875

≤ 39

0.874 (0.713–1.071)

0.195

40~69

0.982 (0.852–1.132)

0.800

≥70

1.277 (1.021–1.597)

0.032

Third quartera

Total

1.324 (1.202–1.459)

< 0.001

≤ 39

1.045 (0.860–1.270)

0.655

40~69

1.190 (1.039–1.363)

0.012

≥70

2.102 (1.715–2.576)

< 0.001

Fourth quartera

Total

6.470 (5.981–6.999)

< 0.001

≤ 39

3.449 (2.945–4.041)

< 0.001

40~69

6.758 (6.071–7.522)

< 0.001

≥70

10.029 (8.414–11.954)

< 0.001

  1. 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)
  2. Dependent variable is the occurrence of HFRS
  3. CI; confidence interval
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BMC Infectious Diseases

ISSN: 1471-2334

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