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Table 2 Meta-regression of potential moderators of housing effects on hazard ratios

From: Conventional laboratory housing increases morbidity and mortality in research rodents: results of a meta-analysis

  Test statistic p
Species F1,27 = 0.3206 0.5759
Sex F1,27 = 0.1448 0.8659
Social status F2,27 = 0.8277 0.4479
Spontaneous or induced disease F1,27 = 0.0141 0.9065
Species × sex F1,27 = 0.0003 0.9854
Species × social status F1,27 = 0.0120 0.9136
Sex × social status F2,27 = 0.6782 0.5160
Resource category F1,26 = 0.0025 0.9608
After removal of ‘red flags’
Species F1,18 = 0.5480 0.4687
Sex F2,18 = 0.0773 0.9259
Social status F2,18 = 0.1923 0.8267
Spontaneous or induced disease F1,18 = 0.8882 0.3584
Species × sex F1,18 = 0.1946 0.6643
Species × social status F1,18 = 1.6277 0.2182
Sex × social status F2,18 = 0.5397 0.5921
Resource category F1,17 = 0.0595 0.8103
  1. Results from a random-effects meta-regression investigating potential moderators of housing effects (effects of conventional housing versus housing ‘enriched’ with resources supporting species-typical behaviour) on mortality rates (hazard ratios). (See Additional file 11 for a replicate excluding study weights)