Association between air pollution and suicide: a time series analysis in four Colombian cities

Fernández-Niño, Julián Alfredo; Astudillo-García, Claudia Iveth; Rodríguez-Villamizar, Laura Andrea; Florez-Garcia, Víctor Alfonso

doi:10.1186/s12940-018-0390-1

Environmental Health

Table 4 Models with lagged and cumulative effects for suicides among four Colombian cities stratified by sex, 2011–2014

From: Association between air pollution and suicide: a time series analysis in four Colombian cities

Pollutant	Men					Women
Pollutant	Lag	IRR	95% CI		p	IRR	95% CI		p
NO₂	L0	0.98	0.92	1.05	0.61	0.98	0.86	1.12	0.79
	L1	0.96	0.89	1.03	0.25	1.00	0.86	1.17	0.96
	L2	1.02	0.95	1.10	0.61	0.97	0.83	1.13	0.69
	L3	1.05	0.98	1.14	0.18	1.05	0.90	1.22	0.57
	L4	1.06	0.98	1.14	0.16	1.18	1.01	1.37	0.03^a
	L5	0.93	0.87	1.01	0.09	1.03	0.88	1.20	0.71
	L6	1.00	0.93	1.08	0.95	0.94	0.80	1.09	0.41
	L7	1.00	0.93	1.06	0.89	0.96	0.84	1.09	0.50
	L1–7	0.99	0.93	1.04	0.61	1.06	0.95	1.19	0.27
SO₂	L0	1.02	0.97	1.07	0.51	0.96	0.85	1.08	0.47
	L1	0.95	0.89	1.01	0.07	0.96	0.84	1.09	0.52
	L2	0.97	0.92	1.03	0.35	0.98	0.86	1.11	0.73
	L3	1.05	0.99	1.11	0.09	1.05	0.92	1.19	0.50
	L4	0.98	0.92	1.04	0.49	1.06	0.93	1.21	0.36
	L5	1.03	0.98	1.09	0.26	0.99	0.86	1.13	0.83
	L6	0.96	0.91	1.02	0.18	0.97	0.85	1.11	0.65
	L7	1.01	0.96	1.06	0.71	0.96	0.85	1.08	0.47
	L1–7	1.00	0.98	1.00	0.15	0.99	0.96	1.03	0.63
PM₁₀	L0	0.96	0.92	1.02	0.18	1.00	0.90	1.12	0.93
	L1	1.01	0.95	1.07	0.83	0.96	0.85	1.09	0.55
	L2	0.98	0.92	1.04	0.51	0.99	0.88	1.12	0.87
	L3	1.04	0.99	1.11	0.13	1.02	0.91	1.14	0.70
	L4	1.05	0.99	1.12	0.08	1.12	0.99	1.25	0.06^a
	L5	0.98	0.92	1.04	0.43	0.92	0.82	1.05	0.22
	L6	0.99	0.93	1.05	0.68	1.00	0.88	1.13	0.94
	L7	0.99	0.94	1.04	0.72	0.98	0.88	1.09	0.67
	L1–7	0.99	0.94	1.05	0.82	0.99	0.88	1.11	0.83
PM_2.5	L0	1.01	0.96	1.05	0.83	1.03	0.94	1.14	0.50
	L1	1.00	0.94	1.05	0.92	0.93	0.83	1.05	0.24
	L2	0.98	0.92	1.03	0.42	1.05	0.93	1.17	0.44
	L3	1.02	0.96	1.08	0.50	0.97	0.87	1.09	0.65
	L4	1.06	1.00	1.12	0.04^a	1.16	1.04	1.29	0.01^a
	L5	0.98	0.93	1.03	0.43	0.89	0.79	0.99	0.04
	L6	0.98	0.93	1.04	0.49	0.95	0.85	1.07	0.38
	L7	1.01	0.96	1.05	0.82	1.04	0.95	1.15	0.38
	L1–7	1.01	0.97	1.06	0.57	0.99	0.91	1.08	0.87
CO_max	L0	1.00	0.99	1.00	0.61	1.00	0.99	1.01	0.79
	L1	1.00	0.99	1.00	0.25	1.00	0.99	1.01	0.96
	L2	1.00	1.00	1.01	0.61	1.00	0.99	1.01	0.69
	L3	1.00	1.00	1.01	0.18	1.00	0.99	1.01	0.57
	L4	1.00	1.00	1.01	0.16	1.01	1.00	1.02	0.03^a
	L5	1.00	0.99	1.00	0.09	1.00	0.99	1.01	0.71
	L6	1.00	1.00	1.01	0.95	1.00	0.99	1.01	0.41
	L7	1.00	1.00	1.00	0.89	1.00	0.99	1.00	0.50
	L1–7	1.00	0.99	1.00	0.61	1.00	0.99	1.01	0.27
O₃	L0	0.98	0.93	1.04	0.52	1.07	0.95	1.20	0.25
	L1	1.05	0.98	1.11	0.16	0.96	0.84	1.10	0.54
	L2	1.02	0.96	1.09	0.56	1.00	0.87	1.14	0.96
	L3	0.98	0.92	1.04	0.45	0.93	0.81	1.06	0.29
	L4	1.02	0.95	1.08	0.62	1.04	0.91	1.18	0.59
	L5	0.97	0.91	1.03	0.33	0.98	0.86	1.12	0.75
	L6	1.05	0.98	1.12	0.14	0.97	0.85	1.11	0.65
	L7	1.01	0.96	1.00	0.63	1.04	0.93	1.17	0.49
	L1–7	1.05	1.00	1.10	0.05	0.97	0.88	1.07	0.52

For each pollutant the IRR are mean changes in the rates per increase in this 20% of the average (6 μg/m³ for NO₂, 2 μg/m³ for SO₂, 0.4 μg/m3 for CO and 10 μg/m³ for O₃). For PM₁₀ and PM_2.5, the values were centered by convention on 10 and 5 μg/m³, respectively. L1-L7 represent the cumulative effect of the moving average in the last 7 days
IRR incidence rate ratio, CI confidence interval
Estimates are adjusted for temperature, precipitation, humidity and their lags (from one day to up 7 days) as well as holidays
^aNo significant considering Bonferroni correction

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