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Table 1 Sample demographics, n = 1030 dogs.

From: Owner reports of attention, activity, and impulsivity in dogs: a replication study

Age groups n (mean ± SE)
   Mean age, all dogs 1030 (75.8 ± 1.4)
Juvenile (4.5-23 months) 129 (15.6 ± 0.5)
Young Adult (24-59 months) 301 (42.7 ± 0.6)
Adult (60-95 months) 260 (77.1 ± 0.6)
Senior (96-23 months) 340 (126.9 ± 1.3)
Geographic distribution of responses   (%)
   (49) US states represented (incl. District of Columbia) 980 (95.15)
   Canada 41 (3.98)
   (7) Countries other than United States 9 (0.87)
Gender distributions   
   Males 531 (51.6)
Neutered males 392 (38.1)
Intact males 139 (13.5)
   Females 495 (48.1)
Spayed females 408 (39.6)
Intact females 87 (8.4)
Breed information   
   Number of AKC breeds represented 118  
Distribution of dogs by AKC group   
   Herding 260 (25.2)
   Hound 51 (5.0)
   Non-sporting 85 (8.3)
   Sporting 205 (19.9)
   Terrier 56 (5.4)
   Toy 37 (3.6)
   Working 70 (6.8)
   Not AKC 51 (5.0)
   Mixed breed 205 (19.9)
Training status   
   Untrained 288 (28.0)
   Beginner 289 (28.1)
   Advanced 453 (44.0)
  1. 1Note: age was used as a continuous covariate in analyses. As such, Age Groups are provided for informational purposes only.