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European Radiology Experimental

Table 2 Descriptive data and statistical analyses for the validation group

From: A new method for estimating patient body weight using CT dose modulation data

 

Validation group

Women

Men

Number of cases

125

43

82

Female

43

43

0

Male

82

0

82

Minimum age

18

19

18

Maximum age

96

96

88

Mean age

56.4

59.2

55.0

SDa (±)

18.3

21.7

16.0

Minimum weight

32

32

50

Maximum weight

128

100

128

Mean weight

74.8

66.6

79.1

SDa (±)

16.7

16.9

14.9

Minimum predicted weight

28.1

28.1

50.2

Maximum predicted weight

119.4

101.1

119.4

Mean predicted weight

74.2

66.0

78.5

SDa (±)

16.6

17.6

14.3

Minimum mAseff

65

65

110

Maximum mAseff

274

238

274

Mean mAseff

169.5

154.9

177.2

SDa (±)

38.3

41.8

34.0

Pearson’s r b

0.969

0.972

0.960

p value (correlation)c

< 0.001

< 0.001

< 0.001

p value (t-test)d

0.119

0.394

0.196

  1. Applying the equation on the validation group revealed a strong correlation between measured BW and predicted BW (r = 0.969). The Pearson coefficient r was 0.972 for females and 0.960 for males. All correlation coefficients were statistically significant (p < 0.001). The Student t-test revealed no significant difference between actual BW and predicted BW for the validation group (p = 0.119; females, p = 0.394; males, p = 0.196)
  2. a Standard deviation
  3. b Pearson correlation coefficient between actual weight and predicted weight (calculated by the equation)
  4. c p value of the correlation
  5. d p value of the Student’s t-test
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