Comparison of first trimester dating methods for gestational age estimation and their implication on preterm birth classification in a North Indian cohort

Table 3 The Jaccard similarity coefficient of PTB classification between each pair of the method

Formula	LMP	Hadlock	McLennan-Schluter	Robinson-Fleming	Sahota	Verburg	INTERGROWTH-21st	Garbhini-GA1
LMP	1.00	0.49	0.50	0.50	0.52	0.53	0.53	0.50
Hadlock		1.00	0.90	0.88	0.88	0.81	0.80	0.77
McLennan-Schluter			1.00	0.98	0.83	0.82	0.80	0.69
Robinson-Fleming				1.00	0.82	0.81	0.79	0.68
Sahota					1.00	0.92	0.89	0.83
Verburg						1.00	0.87	0.83
INTERGROWTH-21st							1.00	0.87
Garbhini-GA1								1.00

ISSN: 1471-2393