Table 1

Description of wind variables grouped by SIDS event and no-SIDS days

Day effects	(ave se)	day 0	day 1	day 2	day 3	day 4	day 5	day 6	day 7	day 8
Proportion of predominantly N days
SIDS		0.051	0.042	0.037	0.040	0.035	0.031	0.029	0.026	0.040
No-SIDS		0.033	0.034	0.034	0.034	0.034	0.035	0.035	0.035	0.034
Proportion of predominantly NE days
SIDS		0.160	0.149	0.127	0.150	0.156	0.141	0.141	0.134	0.134
No-SIDS		0.141	0.141	0.143	0.141	0.141	0.142	0.142	0.143	0.143
Proportion of predominantly E days
SIDS		0.187	0.204	0.242	0.217	0.193	0.189	0.204	0.176	0.174
No-SIDS		0.233	0.232	0.229	0.231	0.233	0.233	0.233	0.235	0.235
Proportion of predominantly SE days
SIDS		0	0	0	0	0	0	0	0	0
No-SIDS		0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Proportion of predominantly S days
SIDS		0.055	0.042	0.055	0.042	0.072	0.064	0.070	0.064	0.050
No-SIDS		0.079	0.080	0.079	0.080	0.078	0.079	0.078	0.079	0.080
Proportion of predominantly SW days
SIDS		0.167	0.152	0.154	0.138	0.154	0.152	0.171	0.156	0.169
No-SIDS		0.146	0.147	0.147	0.148	0.147	0.147	0.146	0.147	0.146
Proportion of predominantly W days
SIDS		0.059	0.077	0.070	0.068	0.072	0.062	0.062	0.066	0.055
No-SIDS		0.059	0.058	0.058	0.059	0.058	0.059	0.059	0.059	0.059
Proportion of predominantly NW days
SIDS		0.059	0.048	0.061	0.040	0.072	0.068	0.051	0.073	0.072
No-SIDS		0.063	0.063	0.062	0.064	0.062	0.062	0.063	0.061	0.062
Proportion of mixed wind direction days
SIDS		0.088	0.103	0.064	0.099	0.061	0.081	0.077	0.083	0.084
No-SIDS		0.091	0.089	0.092	0.090	0.093	0.091	0.091	0.091	0.091
Proportion of predominantly windless days
SIDS		0.174	0.183	0.191	0.206	0.187	0.211	0.194	0.222	0.222
No-SIDS		0.155	0.154	0.154	0.153	0.154	0.152	0.153	0.151	0.151
Mean of average hourly wind speed (knots)
SIDS	(0.162)	8.178	7.761	7.597	7.556	7.719	7.724	7.763	7.746	7.843
No-SIDS	(0.043)	8.214	8.244	8.257	8.260	8.247	8.245	8.242	8.243	8.236
Mean of maximum wind speed (knots)
SIDS	(0.253)	16.10	15.45	15.25	15.16	15.68	15.36	15.51	15.35	15.68
No-SIDS	(0.067)	16.10	16.15	16.16	16.17	16.13	16.15	16.14	16.15	16.13
Mean of standard deviation of hourly wind speed (knots)
SIDS	(0.069)	4.415	4.290	4.227	4.254	4.381	4.267	4.314	4.274	4.344
No-SIDS	(0.019)	4.459	4.468	4.473	4.471	4.461	4.469	4.465	4.468	4.463
Mean of average hourly change in wind direction (degrees)
SIDS	(0.343)	17.55	17.79	17.92	17.66	17.93	17.85	17.84	17.44	17.83
No-SIDS	(0.092)	17.98	17.96	17.95	17.97	17.95	17.95	17.95	17.98	17.95
Mean of maximum hourly change in wind direction (degrees)
SIDS	(2.121)	104.7	104.4	105.4	103.3	103.8	103.9	107.0	103.8	104.9
No-SIDS	(0.572)	105.6	105.6	105.5	105.6	105.6	105.6	105.4	105.6	105.5
Between day effects		(ave se)	day 0–1	day 1–2	day 2–3	day 3–4	day 4–5	day 5–6	day 6–7	day 7–8
Mean absolute difference in the predominance of windless days
SIDS		(0.018)	0.229	0.206	0.242	0.239	0.237	0.240	0.262	0.279
No-SIDS		(0.005)	0.201	0.203	0.201	0.201	0.201	0.201	0.199	0.198
Mean absolute difference in average daily wind speed (knots)
SIDS		(0.108)	3.049	3.000	3.036	3.086	3.095	3.115	3.194	3.424
No-SIDS		(0.030)	3.156	3.160	3.158	3.154	3.154	3.152	3.146	3.129
Mean absolute difference in standard deviation of daily wind speed (knots)
SIDS		(0.181)	4.883	4.991	4.972	4.945	5.029	4.903	5.204	5.266
No-SIDS		(0.049)	5.011	5.003	5.005	5.007	4.999	5.008	4.985	4.980
Mean absolute difference in average daily change in wind direction (degrees)
SIDS		(0.271)	8.141	8.056	7.846	7.628	7.550	8.108	8.017	7.862
No-SIDS		(0.072)	7.903	7.910	7.923	7.938	7.942	7.901	7.908	7.918