Skip to main content

Table 2 Time series modeling of age-standardized first-time offense rates for heroin and methamphetamine, from 2001 to 2017 in Taiwan

From: The impact of Taiwan’s implementation of a nationwide harm reduction program in 2006 on the use of various illicit drugs: trend analysis of first-time offenders from 2001 to 2017

Parameters in the parsimonious model Coefficient estimate Standard error t‐statistic P value
First-time offense rate for heroin
 Intercept (β0) 75.86 4.63 16.38  < .0001
 Baseline slope (β1) − 3.25 0.74 − 4.42 0.001
 Level change after intervention (β2) − 22.37 7.91 − 2.83 0.01
 β21 6.88    
First-time offense rate for methamphetamine
 Intercept (β0) 39.21 3.69 10.62  < .0001
 Baseline slope (β1) 0.66 0.36 1.83 0.09
First-time offense rate for ecstasy
 Intercept (β0) 16.91 2.01 8.42  < .0001
 Baseline slope (β1) − 0.77 0.20 − 3.92 0.001