Table 3. Associations between heatwaves and heat-related illness among workers in British Columbia, Canada, between 1 June and 31 August from 2001–2021: Statistics compared between 2021 summer and 2001–2020 summers. [RR=relative risk; CI=confidence interval].
| Variable | 2001–2021 N=521 |
2001–2020 N=414 |
2021 N=107 |
|||
|---|---|---|---|---|---|---|
| RR (95% CI) | RR (95% CI) | RR (95% CI) | ||||
| Overall | 4.33 (2.98–6.27) a | 3.24 (2.11–4.98) a | 10.19 (4.45–23.35) a | |||
| Age group (years) | ||||||
| 15–24 | 5.42 (2.35–12.46) a | 3.84 (1.51–9.77) a | 20.18 (2.33–174.50) a | |||
| 25–34 | 6.54 (3.04–14.05) a | 3.99 (1.69–9.43) a | 43.63 (4.57–416.71) a | |||
| 35–44 | 2.23 (1.00–4.96) a | 1.82 (0.73–4.53) | 2.78 (0.38–20.29) | |||
| 45–54 | 12.77 (3.72–43.80) a | 10.67 (2.33–48.84) a | 27.23 (2.61–284.15) a | |||
| ≥55 | 1.77 (0.64–4.93) | 1.83 (0.54–6.25) | 0.77 (0.08–7.10) | |||
| Sex | ||||||
| Male | 4.41 (2.80–6.95) a | 3.69 (2.21–6.15) a | 8.33 (2.88–24.11) a | |||
| Female | 4.33 (2.23–8.43) a | 2.48 (1.11–5.68) a | 13.53 (3.54–51.62) a | |||
| Occupation b | ||||||
| Primary industry | 2.01 (0.56–7.20) | 1.70 (0.36–8.12) | 3.50 (0.44–28.02) | |||
| Trades, transport, and equipment operators and related | 3.36 (2.00–5.63) a | 2.96 (1.63–5.35) a | 4.83 (1.55–15.08) a | |||
a Statistically significant with P<0.05. b Relative risks by occupation were only reported for the two occupational groups with the highest claim counts.