The authors wish to advise that one of two time points used to calculate the mean fasting glucose and insulin concentrations, one of 11 time points used to calculate mean 24 h glucose and insulin concentrations, cat signalment and body condition variables for lean cats published in Coradini et al. ⁽Reference Coradini, Rand and Morton¹⁾ were previously published in Tan et al. ⁽Reference Tan, Rand and Morton²⁾.