Table 1.

Descriptions of three datasets used for analysis and list of outcome variables and predictors considered.

Datasets for analysis	N (M:F)	Outcome variable(s)	Predictors
Retrospective Guide Dogs data	10,968 (5,703M: 5,265F)	Survival analysis: time taken to withdrawal from training or working for behavioral reasons	Breed (3,417 Golden Retriever × Labrador, 3,387 Labrador, 790 Labrador × Golden Retriever, 3,429 “Other” 11 breeds or crosses), Sex, Guide Dogs bred (9,873 bred by Guide Dogs and 1,095 bred externally)
		MSM: transitions between “Puppy Walking,” “Training,” and “Withdrawal” from training
Controlled behavior test: puppy Puppy Profiling Assessment (PPA) data	801 (421M: 380F)	Survival analysis: time taken to withdrawal for behavior reasons from training	Behavior test scores on seven point scale for: following-response, retrieve-response, restraint-response, restraint-recovery, noise-response, stroking-response, stroking-recovery, squirrel-response, squirrel-recovery, tunnel-response, ramp-response
		MSM: transitions between “Puppy Walking,” “Training,” and “Withdrawal” from training
Behavior questionnaire of dogs during puppy walking	1,402 (678M: 724F)	Survival analysis: time taken to withdrawal for behavior reasons from training	Trait scores from questionnaire: distractibility, excitability, trainability, general anxiety, adaptability, body sensitivity and stair anxiety Mean score of neutral body posture
		MSM: transitions between “Puppy Walking,” “Training,” and “Withdrawal” from training