. 2021 Mar 15;18(6):3003. doi: 10.3390/ijerph18063003

Table 2.

Lincom estimates for the multi-group comparison.

Measure of Interest	Model Parameter	2012 ^b			2014 ^c
Measure of Interest	Model Parameter	Point Estimate	p-Value	95% CI	Point Estimate	p-Value	95% CI
Within-group comparison ^a
Pre-intervention trend: control	β1	34,426	0.53	−81,194 to 150,044	−23,911	0.50	−98,843 to 51,022
Pre-intervention trend: treatment	β5 + β1	39,626	0.001	23,939 to 55,313	142,17	0.13	−4684 to 33,117
Difference pre-intervention: treatment versus control	β5	5201	0.92	−111,477 to 121,880	38,127	0.30	−39,152 to 115,406
Difference immediately following the intervention: treatment versus control	β6	80,095	0.61	−249,356 to 409,546	−181,221	0.11	−412,852 to 50,409
Post-intervention trend: control	β1 + β3	−26,400	0.44	−98,800 to 46,000	−117,000	0.001	−155,000 to −79,800
Post-intervention trend: treatment	β1 + β3 + β5 + β7	17,000	0.001	6987 to 27,000	18,000	0.08	−2220 to 38,200
Difference post-intervention: treatment versus control	β5 + β7	43,400	0.22	−2.9700 to 117,000	135,000	0.001	92,700 to 178,000
Difference pre- versus post-intervention: control	β3	−60,862	0.37	−202,176 to 80,453	−93,397	0.03	−177,347 to −9447
Difference pre- versus post-intervention: treatment	β3 + β7	−22,647	0.03	−42,329 to −2964	3759	0.81	−29,035 to 36,552
Difference pre- versus post-intervention: treatment versus control	β7	38,215	0.57	−104,464 to 180,893	97,155	0.04	7028 to 187,283

^a Aged 65 years and older with lowest income (treatment) vs. highest income (control). ^b Pre-intervention vs. post-intervention for the 2012 policy. ^c Pre-intervention vs. post-intervention for the 2014 policy.