Results of the (standardised) individual analysis for each city, Barcelona, Valencia and Vigo, 1992–1994
| City | Black smoke2-150 | Sulphur dioxide2-151 | |||||
|---|---|---|---|---|---|---|---|
| β | 95% CI | β | 95% CI | ||||
| Barcelona | 0.00069 | 0.00014, 0.00124 | 0.00028 | 0.00008, 0.00049 | |||
| Valencia | 0.00118 | 0.00037, 0.00199 | −0.00129 | −0.00259, −0.00001 | |||
| Vigo | 0.00068 | 0.00009, 0.00128 | 0.00102 | −0.00005, 0.00210 | |||
↵2-150 One lag, introduced linearly.
↵2-151 One lag, introduced linearly.
Standardised models also contained the following explanatory variables with parameters statistically significant (p<0.1):
intercept, ns(t,36), friday, saturday, sunday, holidays, ns(temperaturet,4), ns(temperaturet-1,4), ns(temperaturet-2,4), ns(temperaturet-3,4), ns(temperaturet-4,4), ns(temperaturet-2,4):humidityt-2, ns(temperaturet-3,4):humidityt-3, ns(temperaturet-4,4):humidityt-4, humidityt, humidityt-2, humidityt-5, ma(influenza,15), totalt-1, totalt-2, totalt-3, totalt-4, totalt-5.and totalt-6.
Where ns(x,k) denotes a natural cubic spline for x with k degrees of freedom; day of the week an indicator for the day of the week; : denotes interaction, ma(,15) a moving average of 15 terms, and total, daily total mortality.