Effects of Proactive Call to Customers of Norsk Rikstoto (Horse Gambling Operator in Norway): A Randomized Controlled Study

NCT07028450 | Not Yet Recruiting

• 1 other identifier: Spillforsk25/1
• Study Type: interventional
• Target: 195
• Locations: 1 country
• Sites: 1

Brief Summary

Customers/gamblers gambling at Norsk Rikstoto (gambling monopolist in Norway providing horse gambling products with potential gambling problems will be randomly allocated to receive a proactive phone call (encouraging them to change their gambling behavior - e.g., be lowering the loss limit) or to a control condition. Outcomes will be short and long terms registered gambling behavior.

Conditions

Gambling Problem

Keywords

Gambling Problem; Proactive calls; Randomized controlled trial; mini-intervention

Outcome Measures

Primary Outcomes (1)

• Theoretical loss

  Total bet x house advantage ((100%-payback%) / 100)

  Change from baseline (30 days before the call) to day 1-90 after the call (short-term effect) and change from baseline (30 days before the call) to day 91-180 after the call (long-term effect).

Secondary Outcomes (2)

• Total stake

  Change from baseline (30 days before the call) to the first 90 days after the call (short term) and change from baseline to day 91-180 after the call

• Loss percentage

  Change from baseline (30 days before the call) to day 1-90 after the call (short-term effect) and change from baseline (30 days before the call) to day 91-180 after the call (long-term effect).

Study Arms (2)

One proactive call

EXPERIMENTAL

The call is based on principles of motivating interviewing and will in addition encourage the recipient to change his/hers gambling behavior (e.g., lower pre-set loss limits).

Behavioral: Proactive call

Control

NO INTERVENTION

No contact/not reaching out

Interventions

Proactive call BEHAVIORAL

The proactive call will be based on the principles of motivational interviewing. The content of the call comprises: 1) Asking the gambler/recipient to reflect on their gambling behavior, 2) providing to the gambler/recipient an overview of their gambling account and financial history, 3) offering to the gambler/recipient information about responsible gambling tools, such as setting lower limits, locking limits, taking a break, or self-exclusion, and 4) providing to the gambler/recipient information about relevant support services and the Gamban tool in cases where a need is expressed.

One proactive call

Eligibility Criteria

• Age: 18 Years - 50 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• Being identified (based on an algorithm used by Norsk Rikstoto/the gambling provider) as a high risk gambler at least 5 of the last 30 days

You may not qualify if:

• Previously received a proactive call from Norsk Rikstoto

Sponsors & Collaborators

• University of Bergen: lead

Study Sites (1)

University of Bergen, Department of Psychosocial Science

Bergen, Vestland, 5020, Norway

Location

Central Study Contacts

Ståle Pallesen, PhD

CONTACT

+4792632099; staale.pallesen@uib.no

Andre Syvertsen, PhD

CONTACT

+4795137908; andre.syvertsen@uib.no

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: PARTICIPANT
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Model Details: The two arms/conditions involves one proactive phone call or a control condition

Study Record Dates

• First Submitted: June 11, 2025
• First Posted: June 19, 2025
• Study Start: February 23, 2026
• Primary Completion (Estimated): December 31, 2026
• Study Completion (Estimated): December 31, 2026
• Last Updated: February 17, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP

Locations

NO (1)