Investigation of the Effects of Angling as Supportive Therapy in Schizophrenia Treatment on Serum Parameters, Anxiety, Depression, and Quality of Life

NCT07682935 | Recruiting

• 1 other identifier: 2026/09-43
• Study Type: interventional
• Target: 60
• Locations: 1 country
• Sites: 1

Brief Summary

This study aims to evaluate the effects of recreational fishing (angling) as a supportive therapeutic intervention in individuals diagnosed with schizophrenia. Schizophrenia is a chronic psychiatric disorder characterized by disturbances in thinking, perception, emotion, and behavior, often accompanied by negative symptoms such as social withdrawal, anhedonia, and cognitive impairment, which significantly reduce quality of life. Recreational activities, particularly those involving nature-based engagement, have been shown to support psychological well-being through stress reduction, improved attention, and enhanced mood regulation. Angling is considered a mindfulness-like recreational activity that promotes relaxation, concentration, and emotional regulation, potentially offering benefits for individuals with psychiatric conditions. In this randomized controlled study, participants with schizophrenia will engage in a structured recreational fishing program in addition to standard care. The effects of the intervention will be evaluated on biochemical serum parameters, anxiety and depression levels, and quality of life outcomes. The study also aims to assess the psychosocial well-being of participants and determine the feasibility of integrating angling as an adjunctive non-pharmacological intervention in schizophrenia care. The findings are expected to contribute to evidence-based complementary treatment approaches in psychiatric rehabilitation.

Conditions

Schizophrenia; Angling; Supportive Therapeutic

Outcome Measures

Primary Outcomes (6)

• The Positive and Negative Syndrome Scale

  The Positive and Negative Syndrome Scale : he Positive and Negative Syndrome Scale (PANSS), developed by Kay et al., is a semi-structured clinician-rated instrument consisting of 30 items scored on a 7-point scale (1 = absent to 7 = extreme). The scale comprises three subscales: positive symptoms (7 items; score range: 7-49), negative symptoms (7 items; score range: 7-49), and general psychopathology (16 items; score range: 16-112). Total PANSS scores range from 30 to 210, with higher scores indicating more severe psychopathology and poorer clinical status.

  Baseline and immediately after the 8-week intervention.

• Quality of Life Scale for Schizophrenia Patients

  Developed by Heinrich et al. to assess the quality of life of schizophrenia patients, the Turkish validity and reliability study was conducted by Soygür et al. Administered in a semi-structured interview format, the scale evaluates the individual's symptoms and level of functioning over the past four weeks. It consists of 21 items and four sub-dimensions: interpersonal relationships, occupational role, mental symptoms, and daily activities. Scores on the scale range from 0 to 126, with higher scores indicating better quality of life.

  Baseline and immediately after the 8-week intervention.

• UCLA Loneliness Scale

  The UCLA Loneliness Scale-Short Form (ULS-8) is an 8-item self-report instrument used to assess perceived loneliness. Each item is rated on a 4-point Likert scale ranging from 1 ("Never") to 4 ("Always"). Two items are reverse scored. Total scores range from 8 to 32, with higher scores indicating greater perceived loneliness.

  Baseline and immediately after the 8-week intervention.

• Serum Beta-Endorphin Concentration

  Venous blood samples will be collected to measure serum beta-endorphin concentration. Changes in serum beta-endorphin levels will be evaluated to assess the biological effects of the intervention.

  Baseline and immediately after the 8-week intervention.

• Serum Serotonin Concentration

  Venous blood samples will be collected to measure serum serotonin concentration. Changes in serum serotonin levels will be evaluated to assess the biological effects of the intervention.

  Baseline and immediately after the 8-week intervention.

• Serum Cortisol Concentration

  Venous blood samples will be collected to measure serum cortisol concentration. Changes in serum cortisol levels will be evaluated to assess the biological effects of the intervention.

  Baseline and immediately after the 8-week intervention.

Study Arms (2)

recreational fishing (angling)

EXPERIMENTAL

Behavioral: recreational fishing (angling)

Control

NO INTERVENTION

Interventions

recreational fishing (angling) BEHAVIORAL

Fishing will be done.

recreational fishing (angling)

Eligibility Criteria

• Age: 18 Years - 60 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Adults aged 18 years and older
• Able to communicate verbally
• Diagnosed with schizophrenia
• Able to provide written informed consent

You may not qualify if:

• Presence of comorbid psychiatric disorders other than schizophrenia
• Patients in the acute psychotic (attack) phase

Sponsors & Collaborators

• Firat University: lead

Study Sites (1)

Fırat university

Elâzığ, Center, 25240, Turkey (Türkiye)

RECRUITING

MeSH Terms

Conditions

Schizophrenia

Condition Hierarchy (Ancestors)

Schizophrenia Spectrum and Other Psychotic Disorders; Mental Disorders

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: SUPPORTIVE CARE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: June 26, 2026
• First Posted: July 6, 2026
• Study Start: June 15, 2026
• Primary Completion: July 15, 2026
• Study Completion (Estimated): August 15, 2026
• Last Updated: July 7, 2026

Record last verified: 2026-07

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)