Table 3

Simple linear regression analyses results of the association between cognition and plasma BDNF levels, pharmacological treatment, IQ, negative symptoms or drug use in the first episode patient group at 6 months after first hospitalisation
Similarities Digit-symbol coding Logical memory learning curve Verbal paired associates I learning curve Verbal paired associates II
r2 ß (P) r2 ß (P) r2 ß (P) r2 ß (P) r2 ß (P)
BDNF plasma levels 0.194 0.468 0.130 0.397 0.291 0.559 0.140 0.409 0.118 0.382
(0.006) (0.024) (0.001) (0.018) (0.028)
Pharmacological treatment −0.027 0.025 −0.025 −0.056 0.011 0.193 −0.002 −0.157 0.002 −0.117
(0.883) (0.743) (0.245) (0.346) (0.305)
Wechsler Vocabulary (IQ) 0.432 0.669 0.262 0.531 −0.028 −0.015 0.007 0.183 0.224 0.495
(0.000) (0.001) (0.928) (0.270) (0.002)
Negative symptoms (PANSS N) 0.257 −0.530 0.081 −0.335 −0.033 −0.014 0.038 −0.264 0.052 −0.288
(0.002) (0.066) (0.939) (0.145) (0.110)
Tobacco use 0.034 0.246 0.080 0.325 0.074 0.315 −0.011 0.127 1.046 0.120
(0.136) (0.050) (0.054) (0.449) (0.302)
Alcohol use −0.020 0.111 −0.020 −1.112 0.001 0.179 0.053 0.287 −0.017 0.120
(0.538) (0.541) (0.320) (0.105) (0.505)
Cannabis use −0.021 −0.102 −0.017 −0.121 −0.027 0.067 0.001 0.178 −0.027 0.064
(0.568) (0.503) (0.706) (0.314) (0.719)
Other drugs use 0.025 0.083 0.059 −0.299 −0.018 0.117 −0.013 0.137 −0.032 −0.002
(0.646) (0.097) (0.518) (0.448) (0.993)

r2: Adjusted R-square; ß: Standardized correlation coefficient.

de Azua et al.

de Azua et al. BMC Psychiatry 2013 13:27   doi:10.1186/1471-244X-13-27

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