Table 6.

Quartiles for piglet characteristics associated with survival to weaning, experiment 2^1,2

Pig birth weight, g	<1,100	1,100 to 1,240	1,250 to 1,390	>1,400	SEM	P-value
Weaned %	62.2d	68.6c	72.5b	79.2a	0.89	0.005
Birth order ranking, %	<25	25 to 50	50 to 75	>75	SEM	P-value
Weaned, %	71.4a	72.2a	70.4a	66.1b	0.93	<0.001
Total born, n	<14	14 to 16	17 to 18	>18	SEM	P-value
Weaned, %	80.5a	74.6b	68.2c	60.0d	0.90	<0.001
Pig:Teat3	<0.81	0.81 to 1.00	1.00 to 1.13	>1.13	SEM	P-value
Weaned, %	76.8a	72.6b	69.6b	63.3c	0.90	0.001
Colostrum intake, g	<302	302 to 408	408 to 509	>509	SEM	P-value
Weaned, %	52.1d	83.3c	91.6b	93.7a	0.93	<0.001

¹Percentage weaned is calculated as weaned count divided by born alive.

²A total of 11,575 piglets (10,758 live-born and 817 stillborn) were categorized into quartiles within each response variable, with each quartile representing ~25% of piglets in the study population.

³Pig to teat ratio is the number of born alive pigs divided by functional teats per sow.

^a–dMeans within a row not sharing a common superscript differ P < 0.05.