Table 2. Relative risk (RR) and 95% confidence intervals (CI) for different causes of mortality for extremely temperature changes (1%, 5%, 95% and 99% percentiles) at different lag days in Guangzhou.

	RR (95% CI)
	−4.1°C	−2.9°C	2.1°C	2.8°C
Death cause
Non-accidental
Lag0	0.90(0.83–0.98)	0.95(0.90–1.01)	1.05(1.01–1.10)	1.09(1.02–1.17)
Lag5	0.93(0.86–0.99)	0.97(0.92–1.01)	1.02(0.98–1.06)	1.04(0.98–1.10)
Lag10	0.95(0.88–1.02)	0.98(0.93–1.03)	1.00(0.96–1.04)	1.00(0.94––1.06)
Lag15	0.96(0.90–1.04)	0.99(0.94–1.04)	0.98(0.94–1.02)	0.98(0.92–1.04)
Lag25	0.99(0.94–1.05)	1.01(0.98–1.05)	0.98(0.95–1.01)	0.97(0.93–1.02)
Cardiovascular
Lag0	0.95(0.69–1.04)	0.97(0.77–1.01)	1.13(1.03–1.23)	1.18(1.03–1.37)
Lag5	0.96(0.74–1.00)	0.98(0.81–1.00)	1.05(0.97–1.13)	1.09(0.95–1.20)
Lag10	0.96(0.77–1.01)	0.98(0.84–1.02)	1.03(0.92–1.08)	1.05(0.88–1.12)
Lag15	0.96(0.80–1.03)	0.99(0.87–1.04)	1.01(0.90–1.05)	1.03(0.84–1.07)
Lag25	0.95(0.85–1.05)	1.00(0.93–1.07)	1.00(0.92–1.05)	1.01(0.89–1.09)
Respiratory
Lag0	0.83(0.64–1.06)	0.92(0.78–1.09)	1.04(0.93–1.15)	1.07(0.91–1.26)
Lag5	0.85(0.73–0.99)	0.92(0.83–1.03)	1.07(1.01–1.13)	1.11(1.02–1.22)
Lag10	0.87(0.77–0.99)	0.93(0.87–1.01)	1.08(1.03–1.14)	1.14(1.05–1.23)
Lag15	0.89(0.79–1.01)	0.95(0.88–1.02)	1.08(1.02–1.14)	1.13(1.04–1.23)
Lag25	0.93(0.84–1.02)	0.99(0.93–1.05)	1.02(0.97–1.07)	1.06(0.98–1.14)

The bold means statistically significant (p<0.05).