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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Bipolar Disord. 2011 Aug;13(5-6):474–485. doi: 10.1111/j.1399-5618.2011.00941.x

Table 2.

Association analysis of other variables in the study (n = 22)

Cerebellum Prefrontal cortex
SP4 (protein) SP1 (protein) SP4 (protein) SP4 (mRNA)
Age (years)
 Spearman’s r 0.2536 −0.144 −0.420 −0.252
 p-value 0.2807 0.546 0.065 0.284
Gender (male/female)
Mann-Whitney’s p-value 0.6707 0.3211 0.6707 0.2376
PMD (hours)
 Spearman’s r −0.281 −0.432 0.618 0.073
 p-value 0.230 0.057 0.004 0.761
Toxicology
Kruskal-Wallis p-value 0.9583 0.8581 0.2947 0.8562

SP4 and SP1 protein levels in the cerebellum and prefrontal cortex were compared to subjects’ age, gender, postmortem delay (PMD), and toxicology in order to detect if any of these variables was influencing the data. RNA integrity number was also analyzed as a possible variable influencing SP4 mRNA in the prefrontal cortex (r = 0.597, p = 0.005). Correlation among quantitative variables was analyzed by r of Spearman. Qualitative variables were analyzed by Mann-Whitney’s test for two groups and Kruskal-Wallis for more than three groups.