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Table 2 Lag-cumulative relative risks for total adult asthma hospitalizations associated with extreme cold exposure [2.5th percentile (− 6.5 °C) relative to MAT (22 °C)] and extreme heat exposure [97.5th percentile (29 °C) relative to MAT]

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

Lag days

Cold effects

Heat effects

CRR (95% CI)

CRR (95% CI)

Lag 0

1.02 (0.95, 1.10)

1.01 (0.97, 1.05)

Lag 0–3

1.10 (0.88, 1.37)

1.06 (0.93, 1.21)

Lag 0–7

1.25 (0.92, 1.70)

1.16 (0.95, 1.41)

Lag 0–14

1.61 (1.12, 2.31)*

1.39 (1.09, 1.79)*

Lag 0–21

1.99 (1.32, 3.02)*

1.68 (1.27, 2.23)*

Lag 0–30

2.32 (1.57, 3.42)*

2.04 (1.52, 2.74)*

  1. MAT minimum admission temperature, CRR cumulative relative risk, CI confidence interval
  2. *p < 0.05
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Respiratory Research

ISSN: 1465-993X

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