Correlation analysis of depressive symptoms and immune function indicators in patients with malignant melanoma

Table 6 Comparison of routine blood and biochemical indicators, mean ± SD

Indicator	Non-depression group (n = 89)	Depression group (n = 113)	t/Z value	P value
White blood cell count (× 109/L)	6.8 ± 2.1	7.4 ± 2.5	-1.83	0.069
Lymphocyte count (× 109/L)	1.9 ± 0.6	1.6 ± 0.5	3.89	< 0.001
Neutrophil count (× 109/L)	4.2 ± 1.8	5.1 ± 2.2	-3.15	0.002
NLR [M (Q1, Q3)]	2.1 (1.5, 3.2)	3.1 (2.1, 4.8)	-4.67	< 0.001
PLR [M (Q1, Q3)]	142 (108, 189)	168 (128, 235)	-3.21	0.001
Hemoglobin (g/L)	125 ± 18	119 ± 21	2.14	0.034
Platelet count (× 109/L)	268 ± 82	279 ± 96	-0.87	0.385
Albumin (g/L)	38.6 ± 5.2	36.1 ± 6.1	3.08	0.002
Prealbumin (g/L)	0.24 ± 0.08	0.21 ± 0.07	2.79	0.006
Total protein (g/L)	69.8 ± 7.3	67.4 ± 8.6	2.15	0.033

NLR: Neutrophil-to-lymphocyte ratio; PLR: Platelet-to-lymphocyte ratio.