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Table 1 Comparison of patient characteristics (age, gender, chief complaints, and urinalysis) for acute appendicitis and discharged patients (n = 326)

From: A hybrid decision support model to discover informative knowledge in diagnosing acute appendicitis

Characteristics

AA* (n = 152)

Control**

(n = 174)

p value

Age, yrs†

36.57 ± 21.31

43.05 ± 20.86

0.003††

Gender

  

0.021

Male

77 (50.7%)

66 (37.9%)

 

Female

75 (49.3%)

108 (62.1%)

 

Chief complaints

  

0.000††

abdominal

76 (50.0%)

109 (62.6%)

 

left upper quadrant (LUQ)

0 (0.0%)

1 (0.6%)

 

periumbilical area

4 (2.6%)

10 (5.7%)

 

right lower quadrant (RLQ)

60 (39.5%)

16 (9.2%)

 

left lower quadrant (LLQ)

0 (0.0%)

5 (2.9%)

 

lower abdominal

5 (3.3%)

18 (10.3%)

 

right upper quadrant (RUQ)

6 (3.9%)

15 (8.6%)

 

upper abdominal

1 (0.7%)

0 (0.0%)

 

Urinalysis

   

Color

  

0.407

amber

10 (6.6%)

6 (3.4%)

 

brown

1 (0.7%)

1 (0.6%)

 

straw

140 (92.1%)

167 (96.0%)

 

yellow

1 (0.7%)

0 (0.0%)

 

S.G.†

1.02 ± 0.01

1.02 ± 0.01

0.106

pH†

6.61 ± 0.93

6.43 ± 0.92

0.086

Albumin

  

0.412

negative

127 (83.6%)

151 (86.8%)

 

positive

25 (16.4%)

23 (13.2%)

 

Glucose

  

0.000††

negative

116 (76.3%)

170 (97.7%)

 

positive

36 (23.7%)

4 (2.3%)

 

Ketone

  

0.000††

negative

98 (64.5%)

149 (85.6%)

 

positive

54 (35.5%)

25 (14.4%)

 

O.B.

  

0.578

negative

104 (68.4%)

114 (65.5%)

 

positive

48 (31.6%)

60 (34.5%)

 

Urobilinogen, E.U./dL†

0.52 ± 1.49

0.22 ± 0.54

0.020

Bilirubin

  

0.983

negative

139 (91.4%)

159 (91.4%)

 

positive

13 (8.6%)

15 (8.6%)

 

Nitrite

  

0.689

negative

150 (98.7%)

170 (97.7%)

 

positive

2 (1.3%)

4 (2.3%)

 

WBC1

  

0.345

negative

99 (65.1%)

122 (70.1%)

 

positive

53 (34.9%)

52 (29.9%)

 

RBC

  

0.972

negative

53 (34.9%)

61 (35.1%)

 

positive

99 (65.1%)

113 (64.9%)

 

WBC2

  

0.936

negative

11 (7.2%)

13 (7.5%)

 

positive

141 (92.8%)

161 (92.5%)

 

Ep. Cell

  

0.303

negative

30 (19.7%)

26 (14.9%)

 

positive

122 (80.3%)

148 (85.1%)

 

Cast

  

0.284

negative

151 (99.3%)

174 (100.0%)

 

positive

1 (0.7%)

0 (0.0%)

 

Other

  

0.184

negative

147 (96.7%)

172 (98.9%)

 

positive

5 (3.3%)

2 (1.1%)

 

Crystal

  

0.383

negative

151 (99.3%)

171 (98.3%)

 

positive

1 (0.7%)

3 (1.7%)

 
  1. * acute appendicitis; ** discharged patients; † Mean ± SD; †† p < 0.01