Table 3 Coordinates of ROC for serum uric acid to discriminate patients with MMA with abnormal brain images.

From: Associations between elevated uric acid and brain imaging abnormalities in pediatric patients with methylmalonic acidemia under 5 years of age

Imaging findings

AUC (95% CI)

p-value

Cutoff values

Sensitivity, %

Specificity, %

PPV, %

NPV, %

All imaging abnormality

0.74 (0.66–0.81)

 < 0.001

240.45

60.6

76.8

88.2

40.6

Ventricular dilation

0.75 (0.67–0.84)

 < 0.001

240.45

65.9

76.8

80.6

60.6

Myelination delay

0.70 (0.61–0.79)

 < 0.001

237.75

60.3

75

75.9

61.4

Subcortical white matter abnormality

0.69 (0.60–0.78)

 < 0.001

253.9

50.8

82.1

78

60.3

Cerebral atrophy

0.75 (0.66–0.84)

 < 0.001

197.7

84.9

55.4

64.3

79.5

Basal ganglia changes

0.91 (0.84–0.97)

 < 0.001

256.65

89.5

82.1

77.3

92

Globus pallidus changes

0.93 (0.87–0.98)

 < 0.001

256.65

92.9

82.1

72.2

95.8

Hydrocephalus

0.77 (0.67–0.87)

 < 0.001

240.7

68.6

76.8

64.9

83.3

Periventricular white matter abnormality

0.66 (0.52–0.79)

0.031

243.05

56.5

76.8

43.5

76.8

Thinning of the corpus callosum

0.65 (0.43–0.86)

0.243

244.4

66.7

76.8

23.5

95.6

  1. AUC, area under the ROC curve; CI, confidence interval; MMA, methylmalonic acidemia; NPV, negative predictive value; PPV, positive predictive value.