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Table 1 Comparison of general, clinical and socioeconomic characteristics between 2013 and 2015

From: Establishment of a qualified integrated care system after total knee arthroplasty as a role of regional rheumatoid and degenerative arthritis centers

Variables

2013

2014

2015

p value

Numbers

227

225

258

 

Age

71.7 ± 5.9

71.3 ± 6.2

72.7 ± 5.4

0.24

 ≤ 59

5 (2.2)

6 (2.7)

4 (1.6)

0.094

60–69

76 (33.5)

79 (35.1)

61 (23.3)

70–79

126 (55.5)

125 (55.6)

170 (65.9)

 ≥ 80

20 (8.8)

15 (6.7)

23 (8.9)

Elderly (≥ 65)

204 (89.9)

200 (88.9)

239 (92.6)

0.339

Old-elderly (≥ 70)

146 (64.3)

141 (62.3)

193(74.8)

0.006 **

Very elderly (≥ 80)

20 (8.8)

15 (6.7)

23 (8.9)

0.609

Sex (female: male)

206 (90.7): 21 (9.3)

201 (89.3): 24 (10.7)

212 (82.2): 46 (17.8)

0.009 **

Op site (Right)

93 (41.0)

92 (40.9)

119 (46.1)

0.404

BMI

26.8 ± 3.2

26.1 ± 3.5

26.3 ± 3.6

0.076

Weight

62.2 ± 9.3

61.7 ± 9.4

62.7 ± 10.5

0.546

Obesity

165 (72.7)

130 (57.8)

154 (59.7)

0.002 **

LOS

16.7 ± 2.2

16.8 ± 3.5

16.3 ± 1.5

0.08

VAS

5.7 ± 0.7

5.8 ± 0.4

5.8 ± 0.5

0.052

K-L grade

 3/4

75 (33.0)/152 (67.0)

59 (26.2)/166 (73.8)

63 (24.4)/195 (75.6)

0.088

Education

 No formal education

31 (13.7)

28 (12.4)

12 (4.7)

0.001 **

Occupation

 Manual work

16 (7.0)

34 (15.1)

133 (51.6)

 < 0.001 **

Urban residence

 Urban: Country

137 (60.4): 90 (39.6)

132 (58.7): 93 (41.3)

152 (58.9): 106 (41.1)

0.924

Location of residence (Current administrative districts)

 Jeju: Seogwipo

149 (65.6): 78 (34.4)

148 (65.8): 77 (34.2)

174 (67.4): 84 (32.6)

0.895

Former administrative districts

 Jeju city

111 (48.9)

104 (46.2)

122 (47.3)

0.848

Medical insurance

 NHI: Medicaid

209 (92.1): 18 (7.9)

215 (95.6): 10 (4.4)

249 (96.5): 9 (3.5)

0.074

  1. Values are mean ± standard deviation or numbers (%)
  2. Op operation, BMI body mass index, LOS length of stay, VAS visual analogue scale, K-L Kellgrene-Lawrence, NHI national health insurance