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Table 4 Attributable fraction (%) and attributable number (95% eCI) of adult asthma hospitalizations due to different temperature ranges in the total population and subgroups stratified by gender and age

From: Associations between ambient temperature and adult asthma hospitalizations in Beijing, China: a time-stratified case-crossover study

Group

Overall

Extreme heat

Moderate heat

Moderate cold

Extreme cold

AF (%)

AN

AF (%)

AN

AF (%)

AN

AF (%)

AN

AF (%)

AN

Total

29.1 (17.5, 38.0)

5379 (3297, 7038)

2.2 (1.3, 3.0)

404 (247, 547)

5.5 (3.0, 7.8)

1017 (550, 1424)

20.3 (9.1, 28.7)

3750 (1755, 5337)

2.4 (1.4, 3.1)

437 (255, 585)

Male

19.9 (1.0, 33.5)

1499 (43, 2478)

1.3 (0, 2.4)

95 (− 2, 181)

3.1 (− 1.0, 6.6)

233 (− 74, 496)

14.6 (− 2.8, 27.0)

1097 (− 236, 1997)

1.4 (− 0.3, 2.7)

109 (− 20, 202)

Female

34.5 (21.6, 44.2)

3791 (2362, 4843)

2.8 (1.8, 3.7)

307 (202, 406)

7.0 (4.3, 9.5)

768 (477, 1035)

23.8 (11.3, 32.9)

2607 (1237, 3623)

2.9 (1.9, 3.7)

317 (198, 410)

19–64 years old

30.9 (18.1, 40.7)

3423 (1964, 4469)

2.8 (1.8, 3.7)

308 (196, 408)

6.9 (4.0, 9.5)

763 (442, 1048)

20.2 (7.9, 29.4)

2233 (824, 3231)

2.4 (1.3, 3.3)

269 (146, 367)

≥ 65 years old

26.0 (7.7, 39.4)

1889 (502, 2872)

1.3 (0.1, 2.4)

94 (3, 174)

3.3 (− 0.5, 6.5)

239 (− 31, 473)

20.1 (2.2, 32.9)

1464 (186, 2377)

2.1 (0.4, 3.3)

151 (26, 242)

  1. Extreme heat and cold represent temperature ranges at 97.5th percentile of temperature or above (≥ 29 °C), and at the 2.5th percentile of temperature or below (≤ − 6.5 °C), respectively. Moderate heat and cold represent temperature ranges between the MAT (22 °C) and the 97.5th or 2.5th percentile of temperature, respectively
  2. MAT minimum admission temperature, AF attributable fraction, AN attributable number