Study on correlations of BDNF, PI3K, AKT and CREB levels with depressive emotion and impulsive behaviors in drug-naïve patients with first-episode schizophrenia

Table 3 Principal component results of BDNF, PI3K, AKT and CREB concentrations in patients

total variance explanation
component	Initial eigenvalue			Extracting sum of squares of loads
component	total	variance %	accumulate %	total	variance %	accumulate %
1	3.792	94.798	94.798	3.792	94.798	94.798
2	0.151	3.768	98.566
3	0.031	0.780	99.346
4	0.026	0.654	100.000

BDNF, brain-derived neurotrophic factor; PI3K, phosphoinositide-3-kinase; AKT, protein kinase B; CREB, cyclic AMP response-element binding protein.

ISSN: 1471-244X