Comparison of methods for deriving phenotypes from incomplete observation data with an application to age at puberty in dairy cattle

Table 2 Example phenotypes (age in day) for animals that have elevated blood plasma progesterone (BP4) or not (Y/N) at each herd visit (one, two or three)

Example animal	A	B	C	D
Actual age at BP4 elevation (AGEP4)	270	380	340	400
Age at visit one (BP4 status visit one)	280 (Y)	350 (N)	300 (N)	330 (N)
Age at visit two (BP4 status visit two)	310 (Y)	380 (Y)	330 (N)	360 (N)
Age on visit three (BP4 status visit three)	340 (Y)	410 (Y)	360 (Y)	390 (N)
CAT	1	2	3	4
AGEVISIT	280	380	360	421
AUG	200–280	350–380	330–360	390–500

A: an animal with elevated blood plasma progesterone at visit one; B: an animal whose BP4 became elevated between visit one and visit two; C: an animal whose BP4 became elevated between visit two and visit three; and D: an animal whose BP4 became elevated after the third visit
CAT: The number of the visit where the animal was first observed with elevated BP4
AGEVISIT: Age (in day) at the visit the animal was first observed with elevated BP4
AUG: Lower and upper bounds of age (in day) when the animal first had elevated BP4

ISSN: 2049-1891