Table 3

Results of interrupted time series analyses

 Model I (crude rates)Model II (adjusted rates)
Estimate95% CIEstimate95% CI
0 (baseline level)5.6955.25 to 6.149.1315.80 to 12.45
1 (preintervention trend)−0.031−0.17 to 0.110.062−0.08 to 0.21
2 (level change)0.285−0.31 to 0.880.261−0.48 to 1.00
3 (trend change)−0.208−0.41 to −0.01−0.423−0.61 to −0.24