Table 1: Homogeneity of characteristics of participants (n=56).

Characteristics Experimental group (n=28) Control group (n=28) p
N (%) Mean±SD
(Min~Max)
N (%) Mean±SD
(Min~Max)
General characteristics Gender Male 17(30.4) - 17(30.4) - - 1.000
- Female 11(19.6) - 11(19.6) -
Age 40~49 2(3.6) 61.96±8.84
(31~73)
6(10.7) 56.82±12.24
(34~74)
3.38 .364a
- 50~59 7(12.5) 9(16.1)
- 60~69 14(25.0) 9(16.1)
- 70~75 5(8.9) 4(7.1)
Education Elementry school 6(10.6) - 5(8.9) - 2.56 .470
- Middle school 10(17.9) - 6(10.6) -
- High school 6(10.6) - 11(19.6) -
- University 6(10.6) - 6(10.6) -
Clinical characteristics Drugb Antihyper-tensives 28(50.0) - 25(45.0) - 1.18 .395a
- Psychotics 4(7.2) - 6(10.8) -
- Antihistamine 6(10.8) - 10(18.0) -
- Diuretics 10(18.0) - 7(12.6) -
Diseaseb Hypertension 23(41.4) - 25(45.0) - 1.77 1.000a
- DM 22(39.6) - 24(43.2) -
- Others 4(7.2) - 5(9.0) -
HD
duration (year)
Below 5 22(39.3) - 21(37.5) - 1.00 1.000a
- Over 5 6(10.7) - 7(12.5) -
Subjective health - - 3.00±0.39
(1~4)
- 2.79±0.63
(1~4)
1.54 .130
Characteristics related to halitosis Dental
caries
Yes 10(17.9) - 12(21.4) - 0.30 .785
- No 18(32.1) - 16(28.6) -
Teeth
brushing
frequency
(times/day)
Below 3 18(32.1) - 19(33.9) - 0.08 1.000
Over 3 10(17.9) - 9(16.1) -
Drinking Yes 0(0.0) - 1(1.8) - 1.87 1.000a
- No 28(50.0) - 27(48.2) -
Smoking Yes 1(1.8) - 3(5.0) - 1.89 .611a
- No 27(48.2) - 25(44.6) -
Rhinitis Yes 5(8.9) - 6(10.7) - 0.21 .648
- No 23(41.1) - 22(39.3) -
BUN level - - 53.71±13.43
(20.5~82.9)
- 52.61±16.88
(10.0~81.6)
0.27 .788

SD: Standard Deviation, HD: Hemodialysis, DM: Diabetes Mellitus, BUN: Blood Urea Nitrogen. a p-Values were calculated by Fisher's exact test, b Multiple Responses.