The secular trend in the OHCA mortality rate in Taiwan from 2000 to 2012 (%), by age and survival time.

&p<0.05;
#p<0.01;
*p<0.001.
Abbreviations: CI, confidence interval; Coef., coefficient; Int., intercept; MR, mortality rate; OHCA, out-of-hospital cardiac arrest.
aFor the year 2000, t = 0; t = 1 for the year 2001, t = 2 for the year 2002, and so on. The models include lags of 1, 2 and 3 of the structural disturbance.
bσ is the estimated standard deviation of the white-noise disturbance.
The secular trend in the OHCA mortality rate in Taiwan from 2000 to 2012 (%), by age and survival time.