Another osteokine lipocalin 2 (LCN2) was positively associated with total and appendicular lean mass but not grip strength in 204 children with different OI types63 However, these univariate associations may be confounded by negative associations with age, BMI, and certain OI types and genotypes, which were not adjusted for in analyses. Here, LCN2 is linked to osteogenesis imperfecta.