Table 1.

Summary statistics of climatic variables, air pollutants, and daily deaths in summer, Brisbane, Australia, 1996–2004.

Variable	Minimum	25%	Median	75%	Maximum	Mean ± SD
Mean temperature (°C)	18.3	23.4	24.7	26.3	34.5	24.9 ± 2.3
Maximum temperature (°C)	22.2	27.4	28.5	29.9	40.2	28.7 ± 2.2
Minimum temperature (°C)	14.7	19.1	20.6	22.3	28.1	20.6 ± 2.3
Relative humidity (%)	12	47	52	60	99	55 ± 13.5
O3 (ppb)	6	22	28	39	110	32 ± 14.3
NO2 (ppb)	5	13	15	18	43	16 ± 5.5
PM10 (μg/m3)	8	14	17	21	50	18 ± 5.6
Nonaccidental deaths
All ages	5	13	15	18	43	15.5 ± 4.3
0–64 years	0	2	3	4	12	3.0 ± 1.7
≥ 65 years	4	10	12	15	41	12.6 ± 3.9
65–84 years	1	5	7	9	22	7.6 ± 2.9
≥ 85 years	0	3	5	6	23	5.0 ± 2.4
Cardiovascular deaths
All ages	1	5	6	8	31	6.4 ± 2.9
0–64 years	0	0	0	1	4	0.6 ± 0.7
≥ 65 years	0	4	5	7	31	5.8 ± 2.8
65–84 years	0	2	3	4	16	3.1 ± 1.9
≥ 85 years	0	1	2	4	17	2.7 ± 1.8
Respiratory deaths
All ages	0	0	1	2	6	1.2 ± 1.0
0–64 years	0	0	0	0	2	0.1 ± 0.3
≥ 65 years	0	0	1	2	5	1.1 ± 1.0
65–84 years	0	0	0	1	4	0.6 ± 0.8
≥ 85 years	0	0	0	1	4	0.5 ± 0.7
Abbreviations: O3, ozone; NO2, nitrogen dioxide; PM10, particulate matter ≤ 10 μm in aerodynamic diameter. 25% and 75% represent the 25th and 75th percentiles, respectively.