Table 1 Clinical characteristics of the patients.

From: Development of a digital image analysis system for objective evaluation of treatment response in cellulitis

Factor

All (n = 34)

Group Aa (n = 13)

Group Ba (n = 21)

P value

Age(years), mean ± SD

73.6 ± 9.4

73.7 ± 10.7

73.6 ± 8.4

0.629

Male: female

20:14

8:5

12:9

0.332

Mean duration of treatment (day), mean ± SD

23.2 ± 23.9

21.0 ± 11.5

24.5 ± 28.9

0.869

Medical history (n, %)

Diabetes mellitus

11(32.4)

6(46.2)

5(23.8)

0.226

Cellulitis

7(20.6)

2(15.4)

5(23.8)

0.555

Rheumatoid arthritis

4(11.8)

0

4(19.0)

0.094

Chronic venous insufficiency

3(8.8)

0

3(14.3)

0.879

Thrombosis

12(35.3)

5(38.5)

7(33.3)

0.761

Edema

18(52.9)

4(30.8)

14(66.7)

0.042*

Blood test (normal range) (Day 1), mean ± SD

WBC (×103/µL) (3.5–9.2)

11.0 ± 6.0

10.9 ± 2.1

11.4 ± 9.2

0.052

CRP (mg/dL) (~ 0.3)

10.7 ± 9.4

10.3 ± 6.9

12.7 ± 12.6

0.235

Blood test (Day 7), mean ± SD

WBC (×103/µL)

7.5 ± 2.9

7.8 ± 2.9

8.1 ± 3.0

0.552

CRP (mg/dL)

2.7 ± 2.2

2.0 ± 1.9

4.0 ± 5.2

0.783

Cellulitis lesions RGB (Day 1), mean ± SD

R value

190.9 ± 26.7

196.8 ± 27.7

187.8 ± 23.1

0.376

G value

115.6 ± 29.2

116.0 ± 31.6

116.1 ± 26.6

0.896

B value

91.8 ± 27.3

93.0 ± 27.3

91.7 ± 25.8

0.868

RGB distance

64.3 ± 28.5

66.0 ± 26.7

63.2 ± 29.5

0.972

Cellulitis lesions RGB (Day 3), mean ± SD

R value

187.6 ± 22.2

191.1 ± 16.2

183.7 ± 21.8

0.446

G value

119.6 ± 29.7

119.2 ± 30.2

118.8 ± 30.9

0.974

B value

94.3 ± 29.5

93.8 ± 29.4

93.4 ± 31.6

0.923

RGB distance

53.7 ± 31.3

41.0 ± 23.1

68.1 ± 35.6

0.025*

Cellulitis lesions RGB (Day 7), mean ± SD

R value

190.3 ± 23.5

198.2 ± 19.7

186.3 ± 25.0

0.278

G value

128.9 ± 23.9

130.4 ± 25.5

126.9 ± 24.4

0.270

B value

101.6 ± 23.5

105.8 ± 26.8

98.5 ± 21.5

0.038*

RGB distance

43.4 ± 23.4

28.0 ± 15.3

52.6 ± 22.9

0.004**

Cellulitis lesions RGB (Day 14), mean ± SD

R value

190.3 ± 19.0

191.9 ± 16.9

185.3 ± 16.4

0.270

G value

135.7 ± 25.6

138.4 ± 28.0

134.8 ± 23.0

0.384

B value

105.5 ± 23.4

112.5 ± 29.0

102.0 ± 18.6

0.161

RGB distance

43.3 ± 26.7

35.4 ± 14.2

51.4 ± 30.0

0.375

  1. Note: Abbreviations: WBC, white blood cells; CRP, C-reactive protein; SD, standard deviation. *P < 0.05, **P < 0.01. aGroup A, favorable clinical outcome. Group B, delayed clinical improvement.
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