ALB and nasopharyngeal carcinoma: For pre-albumin, hemoglobin, and lymphocyte count, 4 studies (406 patients), 6 studies (453 patients), and 3 studies (138 patients) analyzed the change in values before and after radiotherapy in patients with NPC receiving nutritional support (Fig. 4), all without heterogeneity (I2 = 29.8%, I2 = 0%), as determined using a fixed-effects model, compared with that in the control group.