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Table 6 Increased risk (95 % CIs) per unit humidex increase above threshold for BLSa and ALSb analyses*

From: Impacts of extreme heat on emergency medical service calls in King County, Washington, 2007–2012: relative risk and time series analyses of basic and advanced life support

  All ages Age groups (years)
0–4 5–14 15–44 45–64 65–84 85+
All causes
 BLS 6.6 (4.5,8.7) 11.6 (1.7,22.4) 4.7 (−5.5,15.9) 5.1 (1.9,8.3) 8.6 (5.3,12.1) 7.6 (3.7,11.7) 8.1 (2.9,13.6)
 ALS 3.8 (1.09,6.5) 4.2 (−11.1,22.2) 2.1 (−16.8,25.2) 1.9 (−3,7) 7.7 (3.5,12.0) 2.3 (−2.7,7.5) 3.6 (−3.5,11.2)
Trauma
 BLS −4.3 (−10.2,2.0) 3.4 (−17.2,29.1) 14.5 (−33.9,10.6) −11.5 (−20,−2.6) −2.9 (−13.1,8.5) 4.5 (−7.1,17.6) 7.0 (−8.1,24.7)
 ALS −6.3 (−16.5,5.3) 24.7 (−5.8,65.2) −4.7 (−44.8,64.4) −8.7 (−21.9,6.7) −8.5 (−28,16.3) −18.9 (−51,34.0) −2.1 (−45.3,75)
Non-trauma
 BLS 10.0 (7.6,12.5) −0.5 (−100,Inf) 7.9 (4.5,11.5) 10.9 (6.2,15.8) −0.5 (−100,Inf) 7.9 (4.5,11.5) 10.9 (6.2,15.8)
 ALS 4.2 (1.3,7.1) −7.1 (−26.1,16.9) −1.3 (−24,28.2) 1.7 (−3.9,7.6) 7.8 (3.5,12.3) 2.2 (−2.9,7.5) 4.2 (−2.9,11.8)
No transportation
 BLS 10.9 (7.30,14.6) 19.2 (5. 6,34.5) 18.0 (3.7,34.3) 7.2 (1.8,12.9) 16.0 (9.8,22.6) 8.2 (0.7,16.2) 7.6 (−2.4,18.7)
 ALS 10.0 (3.8,16.6) 15.7 (−15.3,57.9) 10.9 (−22.1,58.1) 12.8 (3.0,23.5) 12.8 (3.0,23.5) 3.0 (−10.6,18.5) −4.1 (−24.2,21.2)
Any transportation
 BLS 5.6 (3.3,8.0) 2.9 (−10.2,17.8) −4.2 (−17.2,11.0) 3.8 (0.1,7.6) 6.3 (2.4,10.3) 7.4 (3.1,11.9) 8.1 (2.2,14.2)
 ALS 3.1 (0.2,6.1) −2.1 (−19.5,19.2) −1.0 (−22.4,26.3) −1.3 (−6.8,4.4) 6.9 (2.4,11.6) 2.0 (−3.3,7.6) 4.6 (−2.8,12.6)
  1. *Bolded estimates are significantly greater than 1 (p <0.05)
  2. a40.7 °C humidex threshold
  3. b39.7 °C humidex threshold