Table 1.
Incidence rate (95% CI) of heat- and cold-related illnesses by participants’ characteristics
| Income level | 10,000 Person-year | Heat-related illnesses | Cold-related illnesses | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Low | Middle | High | Low (n = 1,618) | Middle (n = 2,279) | High (n = 1,169) | Low (n = 1,172) | Middle (n = 1,437) | High (n = 731) | |
| Age (year) | |||||||||
| 20–64 | 152.4 | 227.9 | 121.2 | 9.1 (8.6–9.5) | 8.6 (8.3–9.0) | 8.0 (7.5–8.5) | 6.9 (6.5–7.4) | 5.8 (5.5–6.1) | 5.3 (4.9–5.8) |
| 65+ | 12.8 | 18.8 | 14.1 | 18.6 (16.2–20.9) | 16.6 (14.8–18.4) | 14.3 (12.3–16.3) | 6.0 (4.7–7.3) | 5.7 (4.7–6.8) | 5.9 (4.6–7.1) |
| Sex | |||||||||
| Male | 75.5 | 125.1 | 69.1 | 8.5 (7.8–9.1) | 8.2 (7.7–8.7) | 7.3 (6.7–8.0) | 6.1 (5.5–6.6) | 4.9 (4.5–5.3) | 4.5 (4.0–5.0) |
| Female | 89.8 | 121.6 | 66.2 | 10.9 (10.2–11.6) | 10.3 (9.7–10.8) | 10.0 (9.3–10.8) | 7.5 (7.0–8.1) | 6.8 (6.3–7.3) | 6.3 (5.7–6.9) |
| Smoking status | |||||||||
| Current smoker | 46.5 | 67.0 | 30.6 | 7.7 (6.9–8.5) | 8.0 (7.3–8.7) | 7.6 (6.6–8.6) | 5.3 (4.7–6.0) | 4.5 (4.0–5.0) | 4.3 (3.5–5.0) |
| Former smoker | 12.7 | 22.6 | 14.1 | 9.8 (8.0–11.5) | 7.4 (6.3–8.5) | 7.0 (5.6–8.4) | 6.9 (5.4–8.3) | 5.1 (4.2–6.0) | 4.4 (3.3–5.5) |
| Never smoker | 106.1 | 157.1 | 90.6 | 10.7 (10.1–11.4) | 10.0 (9.5–10.5) | 9.2 (8.6–9.9) | 7.5 (7.0–8.1) | 6.5 (6.1–6.9) | 6.0 (5.4–6.5) |
| Current alcohol consumption | |||||||||
| No | 86.8 | 128.9 | 73.5 | 11.1 (10.4–11.8) | 10.5 (10.0–11.1) | 9.5 (8.8–10.2) | 7.3 (6.8–7.9) | 6.2 (5.7–6.6) | 5.8 (5.3–6.4) |
| Yes | 78.5 | 117.8 | 61.8 | 8.3 (7.7–8.9) | 7.8 (7.3–8.3) | 7.6 (6.9–8.3) | 6.3 (5.8–6.9) | 5.4 (5.0–5.9) | 4.9 (4.4–5.5) |
| Exercise | |||||||||
| No | 99.4 | 140.6 | 68.3 | 10.5 (9.8–11.1) | 9.8 (9.3–10.3) | 9.5 (8.8–10.3) | 6.9 (6.3–7.4) | 6.2 (5.8–6.6) | 6.0 (5.4–6.6) |
| Yes | 65.9 | 106.1 | 67.0 | 8.8 (8.0–9.5) | 8.5 (8.0–9.1) | 7.7 (7.1–8.4) | 6.9 (6.2–7.5) | 5.3 (4.9–5.7) | 4.8 (4.2–5.3) |
| BMI categories | |||||||||
| Underweight | 8.1 | 9.7 | 4.7 | 9.8 (7.7–12.0) | 7.6 (5.9–9.4) | 11.6 (8.5–14.7) | 9.1 (7.0–11.2) | 8.9 (7.0–10.7) | 8.1 (5.5–10.7) |
| Normal weight | 106.3 | 157.2 | 85.4 | 9.5 (8.9–10.1) | 9.2 (8.7–9.6) | 8.4 (7.8–9.0) | 7.6 (7.1–8.1) | 6.6 (6.2–7.0) | 6.0 (5.5–6.6) |
| Overweight | 44.4 | 70.8 | 40.7 | 10.4 (9.4–11.4) | 9.6 (8.9–10.4) | 8.8 (7.9–9.7) | 5.1 (4.5–5.8) | 4.1 (3.7–4.6) | 4.0 (3.4–4.6) |
| Obese | 6.4 | 9.1 | 4.5 | 10.5 (8.0–13.1) | 8.8 (6.9–10.8) | 8.8 (6.1–11.6) | 3.8 (2.3–5.3) | 2.9 (1.8–4.0) | 2.9 (1.3–4.4) |
| High Blood Pressure | |||||||||
| No | 143.7 | 215.2 | 117.8 | 9.7 (9.2–10.2) | 9.1 (8.7–9.5) | 8.5 (7.9–9.0) | 7.2 (6.7–7.6) | 6.1 (5.7–6.4) | 5.6 (5.2–6.1) |
| Yes | 21.5 | 31.5 | 17.5 | 10.4 (9.0–11.7) | 10.1 (9.0–11.2) | 9.8 (8.3–11.2) | 4.9 (4.0–5.9) | 4.2 (3.5–4.9) | 3.8 (2.9–4.7) |
| Hyperglycemia | |||||||||
| No | 154.8 | 231.4 | 126.4 | 9.7 (9.2–10.2) | 9.1 (8.8–9.5) | 8.6 (8.1–9.1) | 6.9 (6.4–7.3) | 5.9 (5.6–6.3) | 5.5 (5.1–5.9) |
| Yes | 10.4 | 15.3 | 8.9 | 10.9 (8.9–13.0) | 10.6 (8.9–12.2) | 9.1 (7.1–11.1) | 6.8 (5.2–8.4) | 4.0 (3.0–5.0) | 4.6 (3.2–6.0) |
BMI body mass index