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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