CD4 and hip fracture: Significant differences were seen in the percentage of IL10 producing CD4 T cells between our three groups, F (2, 50) = 4.93, p = .01, η2 = .16 (Fig. 2a), driven by a significant increase in the percentage of IL10+ CD4 T cells in hip fracture patients with depressive symptoms compared with hip fracture patients without depressive symptoms, p = .04 and healthy controls, p = .02.