CRP and obesity due to melanocortin 4 receptor deficiency: Given that (i) obesity and/or being overweight are states of low-grade systemic chronic inflammation [39] and (ii) systemic chronic inflammation (i.e., elevated pro-inflammatory biomarkers such as CRP) is associated with poor sleep quality [8], the results could reflect that the DII could be linked to sleep quality only in individuals with compromised inflammatory status.