The results of this pilot study show a significant correlation between mood and enjoyment of life in both groups, mood and relationships in the chronic group, average pain and sleep in the chronic group, average pain and eating chewing in the chronic group, and phobia for physical disease with trust in clinicians in the chronic group.
In the acute burn group, but not in the chronic group, increased MPO activity was also reduced by bombesin treatment.
AMPH impaired habituation memory in both subchronic and chronic groups, and the impairment was worse in the chronic group.
Seizure-free rate was significantly higher in the acute seizure group than in the chronic group (p<0.05).
A follow-up study showed that those PVS patients with preserved startle (etc.) were more likely to recover from the PVS (this was true for the acute group, but not the chronic group).
In contrary to the control group, the islets of the chronic group showed significantly higher expression of the apoptotic marker caspase-3 and a significantly lower expression of the proliferation marker Ki69.
Finger BF during the stressful task decreased more (i.e. more vasoconstriction) in the chronic group compared to the non-chronic group.
The chronic group (vs. episodic group) otherwise demonstrated a GM decrease in the bilateral insula and anterior cingulate cortex.
Analyzing the outcomes, the length of stay in the chronic group was higher (27.1 days vs 11.9 days p < 0.001).
The authors reported satisfactory results in 100% of patients in the acute group and 93% of patients in the chronic group, with no statistically significant differences [12].
Regarding the effect of headache frequency (episodic vs. chronic), GM volume was lower for the chronic group (TTH and migraine combined) in the bilateral insula, right anterior cingulate cortex, and cerebellum.
