Table 4. The average annual number of OPD visits, and expenditures per person of different dental procedures among eligible patients and different CKD stages from 2000 to 2008.

					CKD
Parameters	HC (n = 1,438)	HR (n = 3,392)	CKD (n = 5,627)	p b	Stage 1	Stage 2	Stage 3a	Stage 3b	Stage 4	Stage 5	p b
Restorative therapy
OPD visits (mean ± SD)	0.81±0.66	0.83±0.72	0.78±0.69	0.0027c	0.83±0.74	0.82±0.69	0.8±0.67	0.81±0.7	0.77±0.74	0.64±0.59	<0.0001h
OPD expendituresa (NT$, mean)	10,040	9,808	8,812	<0.0001d	9,786	9,457	9,025	8,962	8,462	7,174	<0.0001h
Root canal therapy
OPD visits (mean ± SD)	0.38±0.34	0.43±0.42	0.42±0.39	0.0063e	0.43±0.36	0.43±0.42	0.41±0.35	0.45±0.41	0.43±0.42	0.41±0.34	0.436
OPD expendituresa (NT$, mean)	6,179	6,522	6,140	0.0705	6,217	6,256	6,023	6,626	5,970	5,803	0.3
Periodontal therapy
OPD visits (mean ± SD)	0.76±0.68	0.87±0.86	0.78±0.76	<0.0001f	0.76±0.71	0.84±0.78	0.83±0.73	0.86±0.76	0.76±0.84	0.67±0.66	<0.0001i
OPD expendituresa (NT$, mean)	6,377	7,020	6,149	<0.0001g	6,153	6,640	6,488	6,697	5,835	5,262	<0.0001i

The eligible subjects were recruited patient from 2008 to 2010. N = 10,457.

Abbreviations: CKD, chronic kidney disease; DENT, Dentistry; HC, healthy control; HR, high risk NT$, new Taiwan dollars; OPD, outpatient; WM, Western Medicine.

^aExpenditures were rounded to the nearest whole dollar.

^bANOVA. P<0.05 was considered statistically significant.

^cScheffe's test : HR>CKD.

^dScheffe's test : HC>HR>CKD.

^eScheffe's test : HR>CKD>HC.

^fScheffe's test : HR>CKD>HC.

^gScheffe's test : HR>HC>CKD.

^hScheffe's test : Stage1>Stage2>Stage3a>Stage3b>Stage4>Stage5.

ⁱScheffe's test : Stage3b>Stage2>Stage3a>Stage4>Stage5.