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Table 1 Outcome of author contact and critical appraisal (CA) of 31 studies that satisfied the initial inclusion criteria in a systematic review examining methods to estimate owned dog and cat populations

From: Methods used to estimate the size of the owned cat and dog population: a systematic review

Literature identified1 Clear methods2 Result of attempt to contact author3 Include after critical appraisal
Literature Searches
Acosta-Jamett et al. [33] Yes   No
Agostini et al. [34] No No author found  
Agostini et al. [35] Yes   No
AVMA[36] Yes   Yes
Brooks [37] No No author found  
Butler and Bingham[19] Yes   Yes
De Balogh et al. [38] Yes   No
Degregorio et al. [39] No No author found  
Dias et al. [40] No Author responded No
Egenvall et al. [41] No No author found  
Gregory and Reid [42] No No author found  
Griffiths and Brenner [43] Yes   No
Ibarra et al. [44] Yes   No
Kitala et al. [45] Yes   No
Larrieu et al. [46] No No author found  
Lengerich et al.[47] Yes   Yes
Martin et al. [48] No No author found  
Morales et al. [49] No No author found  
Murray et al.[3] No Author responded Yes
Matter [21] No No author found  
Okoh [50] No No author found  
Ortega-Pacheco et al.[51] Yes   Yes
Patronek et al. [52] No No author found  
Rangel et al. [53] No No author found  
Rautenbach et al. [54] No No author found  
Serafini et al. [4] No No author found  
Slater et al.[5] Yes   Yes
Subbaraj et al. [55] Yes   No
Google Searches
AVMA[1] Yes   Yes
Pet Plan [56] No No author found  
PFMA [26] No Author responded No
  1. 1. Studies in bold were included in the final review.
  2. 2. Methods were judged to be clear (‘yes’) when the methods for calculating the population size estimate reported in the study were transparent and repeatable.
  3. 3. Where the methods were clear enough, no attempt was made to contact the author.