Table 1.
Daily emergency hospital visits, pollutant levels and meteorological variables in Reykjavík 2003-2009
| |
n (%) |
Mean |
Std. dev |
Min-imum |
Max-imum |
Percentiles |
||
|---|---|---|---|---|---|---|---|---|
| 25th | 50th | 75th | ||||||
|
Emergency hospital visits | ||||||||
| All |
24439 (100%) |
9.6 |
3.8 |
0 |
26 |
7 |
9 |
12 |
| Cardiaca |
18782 (76.9%) |
7.3 |
3.3 |
0 |
20 |
5 |
7 |
9 |
| Strokeb |
4082 (16.7%) |
1.6 |
1.3 |
0 |
8 |
1 |
1 |
2 |
| Pulmonaryc |
1575 (6.4%) |
0.6 |
0.8 |
0 |
5 |
0 |
0 |
1 |
| Female |
10269 (42.0%) |
4.0 |
2.2 |
0 |
14 |
2 |
4 |
5 |
| Male |
14170 (58.0%) |
5.5 |
2.6 |
0 |
16 |
4 |
5 |
7 |
| Age 70 years or older |
14862 (60.8%) |
5.8 |
2.7 |
0 |
19 |
4 |
6 |
7 |
|
Pollutants & meteorological variables | ||||||||
| O3 (μg/m3)d |
2355 (92.1%) |
47.3 |
16.8 |
1.4 |
119.4 |
36.3 |
46.1 |
57.2 |
| NO2 (μg/m3) |
2372 (92.8%) |
22.1 |
13.6 |
1.5 |
111.6 |
12.0 |
19.2 |
28.6 |
| PM10 (μg/m3) |
2396 (93.7%) |
21.2 |
19.8 |
1.3 |
261.1 |
11.0 |
15.6 |
23.6 |
| Temperature (°C) |
2533 (99.1%) |
6.0 |
5.2 |
−11.3 |
21.2 |
2.3 |
6.2 |
10.4 |
| Relative humidity (%) | 2533 (99.1%) | 78.0 | 10.8 | 39.3 | 100.0 | 70.5 | 79.6 | 86.3 |
Daily counts for emergency hospital visits were available for all days. n denotes the total number of emergency hospital visits. For pollutants and meteorological variables, n denotes the number of days with data available. The total number of days in the period is 2557.
Std. dev; Standard deviation.
a Cardiac disease (ICD10 codes starting with I20-I27, I46, I48 and I50).
b Stroke (Cerebrovascular disease) (ICD10 codes starting with I61-I69 and G45-G46).
c Pulmonary diseases (ICD10 codes starting with J20-J22, J40-J46 and J96).
d Maximum daily 8-hour mean, daily 24-hour mean for other exposure variables.