We assessed the subjective quality of life (QOL) of 30 deficit schizophrenic patients compared to 112 nondeficit schizophrenic patients. The deficit patients did not differ in term of QOL, total score of positive symptoms, general psychopathology from the nondeficit patients. This result suggested an absence of impact of primary negative symptoms on the subjective QOL in schizophrenic patients.

We investigated the relations between deficit as part of schizophrenic symptomatology and the popular but unclear concept of quality of life (QOL). In a 47-patient sample, subjective QOL was compared in schizophrenics with and without the deficit syndrome. Self- and hetero-rated QOL is more impaired in deficit patients. Differences between deficit and non-deficit groups are more significant as the index used for measuring QOL gets less “behavioral” and more “psycho-pathological”. These results are consistent with existing literature. The “behavioral” dimensions of Heinrichs’ quality of life scale (QLS) are less discriminative between deficit and non-deficit schizophrenics, but they are more independent of the symptoms. They might have a special clinical meaning, which needs to be defined. The concepts of QOL (as used in QLS) and deficit symptomatology are partially redundant. QLS might be an inappropriate, or at least un-specific measure of QOL.

In order to test the hypothesis that an excess of summer births is a risk factor for deficit syndrome, the month of birth was studied in 53 deficit schizophrenic patients compared to 158 non-deficit patients. No significant difference in terms of month of birth or season of birth was observed between deficit and non-deficit patients, suggesting that summer births might not be a risk factor for deficit schizophrenia.

The apolipoprotein E (ApoE) genotype has been found to affect the expression of several neuropsychiatric disorders. We determined ApoE genotype frequencies and their relationship to primary negative symptoms in 61 non-deficit and 45 deficit schizophrenic patients, and compared them with 98 control subjects. No difference was observed when genotype or allele frequencies were compared between the three groups. Our data do not support a role for ApoE in the phenotypic expression of schizophrenia.

The aim of this study was to test that deficit (D) schizophrenic patients as defined by Carpenter et al had a higher prevalence of family history of schizophrenia but less obstetric complications than non-deficit (ND) patients. A lower rate of obstetric complications but an excess of schizophrenic and a higher rate of alcoholism family antecedents in 18 D patients compared to 23 ND patients were found. These results could suggest that there is a different weight of genetic and early environmental factors in D and ND patients.

ABSTRACT

Background: Although historically neglected in clinical research, negative symptoms of schizophrenia are now considered distinct targets of pharmacotherapy. While second-generation antipsychotic treatments were heralded as having a greater therapeutic impact on negative symptoms than their conventional antipsychotic counterparts, the size of this effect is modest. Adjunctive medications such as antidepressants offer limited efficacy, while stimulants have a poor risk–benefit profile. More recently, promising results have been demonstrated with pro-glutamatergic agents such as glycine or D-cycloserine, although a larger trial found no advantage with either agent compared with placebo. Modafinil, a novel wakefulness-promoting agent, is an intriguing candidate for adjunctive pharmacotherapy to treat negative symptoms in schizophrenia. We explored this therapeutic potential through a placebo-controlled trial of patients with prominent negative symptoms. Methods: We randomly assigned patients with schizophrenia or schizoaffective disorder to treatment with either modafinil or placebo for 8 weeks. Double-blind assessments of clinical symptoms and neurocognition were administered at baseline and every 2 weeks thereafter. Results: Twenty subjects were enrolled (N = 10 modafinil, N = 10 placebo). There were no significant differences between modafinil and placebo for changes in negative symptom ratings, the primary study endpoint. However, modafinil treatment was associated with a greater rate and degree of global improvement at study endpoint compared with placebo. No significant worsening of psychopathology was observed and modafinil was well-tolerated. Interpretation: Although no effect on negative symptoms was found, adjunctive therapy with modafinil may result in global improvements in patients with schizophrenia who have prominent negative symptoms. These findings support additional research into a potential role for modafinil in the treatment of negative symptoms in schizophrenia.