Table 3

Diagnostic accuracy of JCard measurements by paediatricians for different TSB levels

JCard valueTSB (μmol/L)Sensitivity % (95% CI)Specificity % (95% CI)PPV % (95% CI)NPV % (95% CI)Positive likelihood ratio (95% CI)Negative likelihood ratio (95% CI)
7≥119.798.5
(97.5 to 99.1)		50.0
(40.7 to 59.3)		94.5
(92.9 to 95.8)		78.9
(68.1 to 87.5)		1.97
(1.6 to 2.4)		0.031
(0.02 to 0.05)
9≥153.997.6
(96.5 to 98.5)		71.7
(64.6 to 78.0)		94.7
(93.2 to 96.0)		85.4
(78.8 to 90.5)		3.44
(2.7 to 4.3)		0.033
(0.02 to 0.05)
9≥342.0100
(95.6 to 100)		14.5
(12.5 to 16.7)		8.1
(6.5 to 10.0）		100
(97.7 to 100)		1.17
(1.1 to 1.2)		0.00
12≥205.297.3
(95.9 to 98.3)		69.0
(63.8 to 73.8)		87.8
(85.5 to 89.9)		91.7
(87.7 to 94.7)		3.13
(2.7 to 3.7)		0.039
(0.03 to 0.06)
12≥342.0100
(95.6 to 100)		24.5
(21.9 to 27.1)		9.1
(7.3 to 11.2)		100
(98.6 to 100)		1.32
(1.3 to 1.4)		0.00
12≥427.5100.0
(75.3 to 100)		23.0
(20.6 to 25.5)		1.4
(0.8 to 2.5)		100.0
(98.6 to 100)		1.30
(1.3 to 1.3)		0.00
15≥256.589.0
(86.0 to 91.4)		64.9
(60.9 to 68.7)		70.2
(66.5 to 73.4)		86.3
(82.8 to 89.4)		2.53
(2.3 to 2.8)		0.17
(0.1 to 0.2)
15≥342.098.8
93.4 to 100		42.0
(39.0 to 45.0)		11.5
(9.2 to 14.0)		99.8
(98.8 to 100)		1.70
(1.6 to 1.8)		0.029
(0.004 to 0.2)
15≥427.5100
(75.3 to 100)		39.6
(36.7 to 42.4)		1.8
(1.0 to 3.1)		100
(99.2 to 100)		1.65
(1.6 to 1.7)		0.00
18≥307.843.6
(37.0 to 50.5)		85.7
(83.2 to 87.8)		41.6
(35.1 to 48.2)		86.7
(84.3 to 88.8)		3.04
(2.4 to 3.8)		0.66
(0.6 to 0.7)
18≥342.058.5
(47.1 to 69.3)		83.0
(80.7 to 85.2)		20.8
(15.7 to 26.6)		96.3
(94.9 to 97.5)		3.45
(2.8 to 4.3)		0.50
(0.4 to 0.6)
18≥427.592.3
(64.0 to 99.8)		80.9
(78.5 to 83.2)		5.2
(2.7 to 8.9)		99.9
(99.4 to 100)		4.84
(4.0 to 5.9)		0.095
(0.01 to 0.6)

  • JCard, jaundice colour card; NPV, negative predictive value; PPV, positive predictive value; TSB, total serum bilirubin.