Table 1. Percent change (95% CI) in total mortality per 10-µg/m³ increment in air pollutants at different temperature strata.

Percentile cut-points for temperature (L, U)		PM10		SO2		NO2		O3
		%	P valuea	%	P valuea	%	P valuea	%	P valuea
		(5–95)	5% L	0.46 (0.21, 0.72)	0.03b	1.56 (0.95, 2.16)	0.05	1.25 (0.71, 1.79)	0.15	1.78 (0.84, 2.73)	<0.01b
			95% U	0.44 (0.07, 0.82)	0.18	1.05 (0.31, 1.79)	0.94	1.04 (0.33, 1.75)	0.73	0.54 (0.15, 0.92)	0.77
5%–95%	0.20 (0.06, 0.34)			1.03 (0.63, 1.43)		0.92 (0.54, 1.31)		0.58 (0.25, 0.92)
(10–90)	10% L	0.42 (0.20, 0.64)	0.04b	1.30 (0.78, 1.82)	0.29	1.17 (0.69, 1.66)	0.20	2.06 (1.21, 2.91)	<0.01b
	90% U	0.39 (0.02, 0.76)	0.29	0.91 (0.15, 1.67)	0.70	0.95 (0.23, 1.66)	0.95	0.47 (0.08, 0.86)	0.39
	10%–90%	0.19 (0.05, 0.33)		1.04 (0.63, 1.46)		0.93 (0.54, 1.32)		0.62 (0.29, 0.96)
(15–85)	15% L	0.40 (0.21, 0.58)	0.01b	1.31 (0.84, 1.77)	0.16	1.20 (0.77, 1.64)	0.05	2.17 (1.46, 2.88)	<0.01b
	85% U	0.30 (−0.01, 0.63)	0.41	0.78 (0.05, 1.52)	0.52	0.81 (0.20, 1.42)	0.78	0.42 (0.05, 0.79)	0.19
	15%–85%	0.17 (0.03, 0.32)		1.01 (0.58, 1.44)		0.89 (0.49, 1.29)		0.66 (0.32, 1.00)
(20–80)	20% L	0.30 (0.13, 0.47)	0.12	1.18 (0.73, 1.63)	0.54	1.07 (0.65, 1.50)	0.25	1.66 (1.03, 2.29)	<0.01b
	80% U	0.36 (0.07, 0.65)	0.20	1.03 (0.34, 1.71)	0.93	0.99 (0.44, 1.55)	0.70	0.51 (0.16, 0.85)	0.55
	20%–80%	0.18 (0.03, 0.33)		1.05 (0.62, 1.49)		0.90 (0.50, 1.30)		0.61 (0.25, 0.96)
(25–75)	25% L	0.32 (0.15, 0.49)	0.05	1.20 (0.76, 1.64)	0.43	1.09 (0.66, 1.51)	0.22	1.44 (0.88, 2.00)	<0.01b
	75% U	0.29 (0.02, 0.56)	0.35	0.91 (0.25, 1.57)	0.68	0.93 (0.41, 1.45)	0.92	0.47 (0.13, 0.80)	0.46
	25%–75%	0.16 (0.01, 0.32)		1.04 (0.59, 1.49)		0.91 (0.50, 1.31)		0.59 (0.22, 0.96)

Abbreviations: PM₁₀, particulate matter less than 10 microns in diameter; SO₂, sulfur dioxide; NO₂, nitrogen dioxides; O₃, ozone.

^aP value for lower and upper temperature stratum compared with normal temperature.

^bStatistically significant (P < 0.05).