. 2012 Oct 5;11:75. doi: 10.1186/1476-069X-11-75

Table 5.

Associations of particulate matter indices, NO₂and O₃with limitation in activities due to breathing problems in all participants and the subgroup of asthmatics (random effects pooled estimates)

Symptom	Pollutant	Lag0		Lag1		Lag2		Lag06
		OR	95% CI	OR	95% CI	OR	95% CI	OR	95% CI
Vigorous activities
	PM₁₀
Total		1.018	0.950-1.092	1.028	0.957-1.103	1.026	0.956-1.102	0.989	0.854-1.146
Asthmatics		0.987	0.869-1.121	1.006	0.873-1.158	1.010	0.873-1.168	0.924	0.726-1.177
	PM_2.5
Total		1.016	0.910-1.135	1.016	0.892-1.158	1.039	0.922-1.169	1.005	0.831-1.216
Asthmatics		0.992	0.856-1.150	0.995	0.843-1.174	1.019	0.858-1.211	0.944	0.743-1.198
	PM_{10 - 2.5}
Total		1.093	0.933-1.281	1.114	0.949-1.308	1.049	0.948-1.160	1.230	0.851-1.779
Asthmatics		0.980	0.817-1.175	1.005	0.816-1.238	1.019	0.919-1.130	0.956	0.612-1.494
	PNC
Total		1.001	0.888-1.129	1.018	0.916-1.133	1.054	0.985-1.129	0.906	0.778-1.054
Asthmatics		0.979	0.895-1.070	1.014	0.924-1.112	1.065	0.976-1.163	0.927	0.748-1.149
	Absorbance
Total		0.999	0.894-1.117	1.021	0.917-1.137	1.010	0.885-1.152	0.994	0.691-1.432
Asthmatics		1.031	0.924-1.151	1.063	0.938-1.206	1.069	0.919-1.243	0.984	0.643-1.507
	NO₂
Total		0.988	0.940-1.038	1.010	0.971-1.051	1.037	0.979-1.097	1.007	0.844-1.202
Asthmatics		0.995	0.916-1.081	1.028	0.960-1.100	1.046	0.945-1.158	0.942	0.713-1.245
	O₃
Total		1.033	0.935-1.141	1.031	0.946-1.124	1.024	0.932-1.125	1.107	0.879-1.394
Asthmatics		0.980	0.887-1.083	0.988	0.927-1.053	0.979	0.922-1.040	0.981	0.850-1.133
Moderate activities
	PM₁₀
Total		0.973	0.888-1.067	0.973	0.923-1.026	0.973	0.907-1.044	0.904	0.729-1.122
Asthmatics		0.946	0.818-1.094	0.958	0.857-1.071	0.979	0.897-1.069	0.859	0.680-1.086
	PM_2.5
Total		0.922	0.749-1.136	0.950	0.848-1.065	0.963	0.862-1.077	0.953	0.808-1.124
Asthmatics		0.896	0.712-1.126	0.979	0.839-1.142	0.965	0.846-1.102	0.938	0.762-1.154
	PM_{10 - 2.5}
Total		1.068	0.913-1.249	1.023	0.932-1.122	1.014	0.966-1.064	0.912	0.667-1.248
Asthmatics		1.000	0.943-1.062	0.987	0.932-1.045	1.007	0.955-1.062	0.727	0.411-1.289
	PNC
Total		1.077	0.937-1.239	1.034	0.899-1.189	1.010	0.927-1.100	0.935	0.762-1.146
Asthmatics		1.075	0.977-1.183	1.025	0.922-1.139	1.016	0.873-1.184	0.835	0.680-1.025
	Absorbance
Total		0.973	0.891-1.062	0.973	0.869-1.088	0.974	0.851-1.116	1.036	0.740-1.451
Asthmatics		0.994	0.871-1.135	0.993	0.854-1.155	0.984	0.814-1.190	0.985	0.618-1.570
	NO₂
Total		1.004	0.917-1.100	0.991	0.915-1.074	1.007	0.932-1.088	1.064	0.873-1.296
Asthmatics		1.004	0.897-1.123	0.988	0.886-1.100	1.000	0.889-1.125	0.999	0.718-1.390
	O₃
Total		0.970	0.899-1.046	1.000	0.916-1.091	1.002	0.939-1.070	1.022	0.879-1.189
Asthmatics		0.940	0.874-1.012	0.979	0.901-1.064	0.979	0.921-1.041	1.007	0.812-1.250
Walking
	PM₁₀
Total		1.010	0.924-1.104	1.039	1.007-1.073	1.012	0.976-1.049	1.074	0.966-1.194
Asthmatics		1.009	0.921-1.105	1.055	1.018-1.094	1.023	0.987-1.061	1.009	0.823-1.237
	PM_2.5
Total		1.000	0.917-1.091	1.019	0.953-1.088	0.963	0.850-1.090	0.839	0.574-1.225
Asthmatics		1.008	0.882-1.152	1.097	1.032-1.167	1.078	1.013-1.147	0.934	0.663-1.316
	PM_{10 - 2.5}
Total		1.072	0.904-1.273	1.076	1.026-1.128	1.044	0.997-1.092	1.079	0.819-1.420
Asthmatics		1.012	0.884-1.159	1.060	1.005-1.119	1.013	0.959-1.069	0.911	0.554-1.499
	PNC
Total		0.978	0.797-1.199	0.986	0.915-1.063	1.007	0.937-1.083	0.975	0.670-1.418
Asthmatics		0.906	0.798-1.029	1.010	0.921-1.106	1.013	0.928-1.106	0.804	0.658-0.981
	Absorbance
Total		1.014	0.915-1.124	1.038	0.956-1.128	1.013	0.942-1.089	0.852	0.544-1.333
Asthmatics		1.036	0.939-1.143	1.100	1.031-1.174	1.078	0.965-1.204	0.942	0.610-1.456
	NO₂
Total		0.979	0.940-1.019	1.011	0.959-1.065	1.034	0.993-1.077	1.075	0.931-1.241
Asthmatics		0.988	0.924-1.057	1.048	0.967-1.136	1.076	0.968-1.196	1.093	0.886-1.349
	O₃
Total		1.012	0.975-1.050	1.004	0.961-1.048	1.020	0.983-1.059	1.038	0.971-1.109
Asthmatics		0.999	0.948-1.053	0.982	0.933-1.033	1.003	0.939-1.071	1.048	0.913-1.203

Bold are significant pooled effects.