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05.07.2015

Health-related quality of life in patients with prominent negative symptoms: results from a multicenter randomized Phase II trial on bitopertin

verfasst von: Diana Rofail, Antoine Regnault, Stéphanie le Scouiller, Carmen Galani Berardo, Daniel Umbricht, Ray Fitzpatrick

Erschienen in: Quality of Life Research | Ausgabe 1/2016

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Abstract

Purpose

Symptoms of schizophrenia fall into three categories (positive, negative and cognitive symptoms), which probably impact differently on patient’s health-related quality of life (HRQoL). The present study aimed to explore HRQoL in patients with prominent negative symptoms.

Methods

In the 323 patients with prominent negative symptoms included in a multicenter Phase II trial investigating the safety and efficacy of bitopertin, HRQoL was assessed using the Schizophrenia Quality of Life Scale (SQLS), symptoms severity using the Positive and Negative Syndrome Scale and functioning using the Personal and Social Performance Scale. SQLS measurement properties were assessed; HRQoL was compared between treatment arms, and relationships between HRQoL, symptoms and functioning at baseline were explored.

Results

Both SQLS scores (Vitality/Cognition and Psychosocial Feelings) demonstrated good test–retest (ICC = 0.77 and 0.74) and internal consistency reliability (Cronbach’s α = 0.86 and 0.93). Clinical validity with regard to schizophrenia severity and ability to detect change in severity of symptoms of schizophrenia were satisfactory. The SQLS structure was not formally disconfirmed. No statistically significant difference was observed between treatment arms. Negative symptoms were more strongly associated with functioning than positive symptoms. Functioning and Anxiety/Depression were strongly related to both SQLS domains.

Conclusion

Overall, SQLS measurement properties were supported in these patients with prominent negative symptoms of schizophrenia. The impact of negative symptoms on functioning and HRQoL suggests that improving these symptoms will be a meaningful benefit in this population of patients.

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Titel: Health-related quality of life in patients with prominent negative symptoms: results from a multicenter randomized Phase II trial on bitopertin
verfasst von: Diana Rofail
Antoine Regnault
Stéphanie le Scouiller
Carmen Galani Berardo
Daniel Umbricht
Ray Fitzpatrick
Publikationsdatum: 05.07.2015
Verlag: Springer International Publishing
Erschienen in: Quality of Life Research / Ausgabe 1/2016
Print ISSN: 0962-9343
Elektronische ISSN: 1573-2649
DOI: https://doi.org/10.1007/s11136-015-1057-9

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Abstract

Purpose

Methods

Results

Conclusion

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