mean age and standard deviation is 32.86 ± 12.76 and
31.48 ± 11.83 (Na, 2007).
Particular “confounding“ factors such as age,
smoking, body mass index (BMI), sex, and infection
also have a bearing on levels of IL-6 and TNF-α
(Himmerich, 2009).
Table 2: Mean Negative Scale of PANSS in Schizophrenic
Patients
Variable
Mean SD p
PANSS
Negative
30,42 1.691 0,002
*Shapiro-Wilk test
Table 2. shows that Negative scale of PANSS with
mean of 30,42 and standard deviation 1,691. From the
results of normality test data using Shapiro-Wilk
found p value = 0.002 (p <0.05), so it can be
concluded the data is not normally distributed.
Fan at.el, show serum TNF-α levels showed a
significant negative association with PANSS total
score (r = −0.210, p < 0.01) and negative subscore (r
= −0.300, p < 0.01) (Fan, 2015).
Table 3 : Mean TNF-α serum level in Schizophrenic
Patients
Variable Mean SD p
TNF-α
22.31938 23.24290 0.000
*Shapiro-Wilk test
Table 3. shows that TNF-α is 22.31938 and deviation
standard 23.24290. From the results of normality test
data using Shapiro-Wilk found p value = 0.000 (p
<0.05), so it can be concluded the data is not normally
distributed.
In a study conducted by Theodoropoulou in
Athens showed significantly higher levels of TNF-α
in treatment-treated chronic schizophrenic patients
(26 ± 8 pg / ml) compared with healthy controls (16
± 6 pg / ml) with p <0.001 (Jiang, 2013).
Prior to the correlative test on the baseline data,
firstly tested the normality of data where the variable
of Negative Scale PANSS tested normalization using
Shapiro Wilk Test because the sample amount is less
than or equal to 50 and it is found that the variable of
PANSS Negative Scale Distribution is abnormal
therefore correlative test of baseline data using
Spearman Correlation test.
Table 4 : Correlation Levels of Serum Tumor Necrosis
Factor-Alpha (TNF-α) And Negative Scale PANSS
Levels of Serum Tumor Necrosis Factor –
Alpha
(TNF-α)
Negative Scale PANSS
r = 0,403
p = 0.004
n = 50
*Spearman test
Spearman correlation test serum level Tumor
Necrosis Factor-Alpha (TNF-α) and PANSS
Negative Scale obtained p value <0.05 and concluded
that there is correlation between serum serum Tumor
Necrosis Factor-Alpha (TNF-α) and Negative Scale
PANSS Strength relationship between serum levels
Tumor Necrosis Factor-Alpha (TNF-α) and Negative
Scale PANSS large 0.403 shows a positive
correlation with moderate correlation strength (r = 0.4
-0.6).
4 DISCUSSION
(Al-Asmari, 2014)showed that TNF-α levels in
schizophrenic patients (27.04±4.11) were
significantly higher than normal controls
(17.25±3.20) an imbalance between proinflammatory
and antiinflammatory cytokines may be involved in
the pathophysiology of schizophrenia through
various mechanisms (Asmari, 2014).
The (Petrescu, 2010) study showed a further
increase in serum TNF-α levels in patients with daily
tobacco exposure of more than 1 pack / day. There
was no significant difference between serum TNF-α
levels of nonsmokers and those who smoked less than
1 pack / day. This suggests that active smokers who
cause inflammation usually require a significant
amount of exposure. So based on this study it can be
concluded that heavy smoking can lead to a
significant increase in serum levels of TNF-α and C-
Reactive Protein (CRP), which supports an imbalance
between proinflammatory and antiinflammatory
factors. TNF-α concentrations are elevated in healthy