Increased Risk of Hospital Admission for Asthma from Short-Term Exposure to Low Air Pressure

Figures & data

Table 1 Baseline Information of Asthma Hospital Admissions of the Total Population and Subgroups in Beijing

	N	Min	Max	Sum	Average	SD
Total	1461	0	65	23,697	16.22	7.861
Male	1461	0	31	9856	6.75	3.813
Female	1461	0	34	13,841	9.47	5.09
< 65	1461	0	52	15,077	10.32	5.397
≥65	1461	0	19	8620	5.9	3.612
PH	1461	0	1	–	–	–
IF	1461	0	1	–	–	–

Table 2 Baseline Information of Meteorological and Air Pollution Data in Beijing

	N	Min	Max	Average	SD
AQI	1459	23	485	123.65	75.173
RH(%)	1461	8	97	53.43	19.858
WS(m/s)	1461	3	34	9.29	4.754
AP(hPa)	1461	994	1044	1016.56	10.166
Tmean(°C)	1461	−16	32	12.88	11.169

Table 3 The Seven-Day CRR (Include 95% C.I.) of Asthma Among the Total Population in Beijing in the Different AP Percentiles

Percentiles	CRR	95% C.I. (Lower Bound)	95% C.I. (Upper Bound)
P1(998hPa)	1.27	1.00	1.62
P5(1001hPa)	1.24	1.00	1.54
P10(1003hPa)	1.22	0.99	1.50
P25(1008hPa)	1.17	0.98	1.41

Figure 1 The seven-day CRR (include 95% C.I.) of asthma among the total population in Beijing.

Figure 2 The association between the AP and the relative risk of asthma in lag 0 day among the total population in Beijing.

Figure 3 The association between the AP and the relative risk of asthma in different single lag day among the total population in Beijing.

Figure 4 The association between the AP and the relative risk of asthma on the day of exposure (lag 0) in different gender subgroups in Beijing.

Figure 5 The association between the AP and the relative risk of asthma in lag 0 day in different age subgroups in Beijing.