Table 2.

Factors of dementia by using Fine and Gray’s competing risk model

	No competing risk in the model				Competing risk in the model
Variables	Adjusted HR	95% CI	95% CI	P	Adjusted HR	95% CI	95% CI	P
Amphetamine‐related disorders
Without	Reference				Reference
With	4.936	4.609	5.285	<0.001	5.034	4.701	5.391	<0.001
Gender
Male	1.275	1.189	1.367	<0.001	1.315	1.227	1.410	<0.001
Female	Reference				Reference
Age group (years)
20–49	Reference				Reference
50–64	0.753	0.675	0.840	<0.001	0.775	0.695	0.865	<0.001
≧65	3.327	3.081	3.593	<0.001	3.836	3.551	4.145	<0.001
Education (years)
0–11	1.407	1.057	1.972	0.011	1.451	1.071	2.005	0.001
≧12	Reference				Reference
Insured premium (NT$)
<18,000	Reference				Reference
18,000–34,999	0.640	0.465	0.881	0.006	0.641	0.466	0.883	0.006
≧35,000	0.425	0.160	1.135	0.088	0.433	0.162	1.155	0.095
CCI_R group
0	Reference				Reference
1	1.051	0.971	1.137	0.218	1.084	1.002	1.173	0.045
2	0.973	0.872	1.086	0.628	1.053	0.943	1.175	0.359
3	0.632	0.540	0.738	<0.001	0.729	0.623	0.852	<0.001
≧4	0.359	0.303	0.426	<0.001	0.487	0.410	0.578	<0.001
Urbanization level
1 (The highest)	0.779	0.705	0.860	<0.001	0.818	0.740	0.904	<0.001
2	0.797	0.731	0.868	<0.001	0.816	0.749	0.889	<0.001
3	0.697	0.612	0.794	<0.001	0.692	0.608	0.788	<0.001
4 (The lowest)	Reference				Reference
Level of care
Medical center	0.784	0.712	0.864	<0.001	0.756	0.686	0.833	<0.001
Regional hospital	0.803	0.743	0.867	<0.001	0.780	0.722	0.842	<0.001
Local hospital	Reference				Reference

HR, hazard ratio; CI, confidence interval; Adjusted HR, Adjusted variables listed in the Table 1; NT$, New Taiwan Dollars; CCI_R, Charlson Comorbidity Index, dementia removed.