Table 3. Thresholds of concentration-response relationship between O3 concentration and daily mortality and the excessive mortality for 1 ppb increment below and above the thresholds adjusting for PM10 in 7 Japanese and Korean cities.
| City | Threshold [ppb, (95% CI)] | Excessive mortality [Below the threshold, % (95% CI)] | Excessive mortality [Above the threshold, % (95% CI)] |
|---|---|---|---|
| Seoul | 15 (12–17) | -0.43(-0.57,-0.29) | 0.02(-0.02,0.06) |
| Daegu | 18 (13–23) | -0.32(-0.60,-0.05) | 0.08(0.00,0.16) |
| Busan | 21 (15–31) | -0.46(-0.68,-0.24) | 0.12(0.06,0.18) |
| Sapporo | 11 (8–19) | -1.14(-2.35,0.07) | 0.00(-0.06,0.06) |
| Tokyo | 34 (29–40) | -0.12(-0.16,-0.08) | 0.17(0.09,0.25) |
| Nagoya | 22 (19–37) | -0.18(-0.30,-0.06) | 0.06(-0.04,0.16) |
| Kitakyushu | 32 (26–41) | -0.08(-0.20,0.04) | 0.17(0.05,0.29) |