Table 3.

Estimated direct medical cost (¥) of inpatients with different characteristics

Parameter	B	P*	Estimated Mean (95% CI)	P**
Age group (years)
≤ 14	Ref.	N.A.	12,923 (10315–16,191)	< 0.001
15~64	.0210	< 0.001	15,951 (12879–19,756)	0.766
≥ 65	−0.385	< 0.001	8794 (6781–11,405)	0.016
Disease type
Endocrine and metabolic disease	Ref.	N.A.	3866 (3286–4547)	< 0.001
Skin disease	1.258	< 0.001	13,602 (7139–25,916)	< 0.001
Blood disease	1.530	< 0.001	17,856 (15581–20,463)	0.019
Digestive disease	0.930	< 0.001	9799 (8030–11,960)	< 0.001
Bone disease	1.165	< 0.001	12,395 (8022–19,152)	< 0.001
Cardiovascular disease	0.827	< 0.001	8839 (7344–10,638)	< 0.001
Immunological disease	2.148	< 0.001	33,107 (14863–73,745)	0.019
Kidney disease	1.332	0.001	14,639 (6601–32,465)	0.118
Number of complications
1	Ref.	N.A.	7527 (5995–9452)	< 0.001
2	−0.267	< 0.001	5762 (4585–7240)	0.676
3	−0.369	< 0.001	5202 (4146–6528)	0.577
4	0.084	0.331	8190 (6430–10,431)	0.916
5	0.313	0.001	10,290 (7959–13,304)	0.270
6	0.538	< 0.001	12,891 (9809–16,942)	0.729
7	0.886	< 0.001	18,259 (13434–24,817)	0.950
8	0.955	< 0.001	19,556 (14209–26,913)	0.960
9	1.175	< 0.001	24,386 (16946–35,085)	0.556
> 10	1.509	< 0.001	34,029 (25593–45,245)	0.620
Payment type
Social Security Card	Ref.	N.A.	10,567 (8663–12,890)	0.002
Medicare Card	−.280	0.001	7986 (6423–9930)	0.746
Hospital Link Card	0.005	0.934	10,623 (8821–12,794)	0.466
Hospital Self-Charge Card	1.396	< 0.001	42,691 (27803–65,550)	0.611
Others	−0.406	0.060	7041 (4491–11,038)	< 0.001

*P value for coefficient B

**P value for estimated mean compared with observed mean