Fig. 2From: Comparison of cortisol and inflammatory response between aged and middle-aged patients undergoing total hip arthroplasty: a prospective observational studyThe stress response (cortisol, a) and inflammatory response (IL-6 and CRP, b and c) of middle-aged and aged patients preoperatively and at 6Â h, 24Â h and 3Â days after THA. Asterisk (*) means the difference between the two groups reached statistical significance (P < 0.05)Back to article page