Tab. 3.

Kappa table of agreement on OP positions in the sub-group with ruptured and intact membranes

Occiput posterior position with ruptured membranes
Ultrasound (+)/ (–)
Digital VE (+)/ (–)		+	–	Total:
	+	(n: 7)	(n: 23)	(n: 30)
	–	(n: 7)	(n: 34)	(n: 41)
	Total:	(n: 14)	(n: 57)	(n: 71)
	Observed agreements %	41 (57.75%)	Kappa = 0.067; 95% CI: From –0.137 to 0.272
	Agreements expected by chance %:	38.8 (54.69%)
Occiput posterior position with intact membranes
Ultrasound (+)/(–)
Digital VE (+)/ (–)		+	–	Total:
	+	(n: 7)	(n: 33)	(n: 40)
	–	(n: 9)	(n: 76)	(n: 85)
	Total:	(n: 16)	(n: 109)	(n: 125)
	Observed agreements %	83 (66.40%)	Kappa = 0.082; 95% CI: From –0.077 to 0.241
	Agreements expected by chance %:	79.2 (63.39%)