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Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.

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Official Title

RATIONAL is a multinational, multicentre, observational, cross sectional study of adult patients in treatment with NSAID therapy for OA, RA or AS during for at least 2 weeks before study visit (at least one dose).

Prevalence study of gastrointestinal risk factors in patients with Osteoarthritis (OA), Rheumatoid arthritis (RA) and  ankylosing spondylitis (AS).

Prevalence study of gastrointestinal risk factors in patients with osteoarthritis, rheumatoid arthritis and ankylosing spondylitis receiving treatment with non- steroidal anti- inflammatory drugs.

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Rating scale for gastrointestinal symptoms in patients, consisting of five areas: reflux syndrome, abdominal pain, constipation syndrome, diarrhoea syndrome and indigestion syndrome.

Assessment of patients' satisfaction with medication, providing scores on four scales: side effects, effectiveness, convenience and global satisfaction.

A generic self-reported, medication-taking behaviour scale in which the specific health issue (e.g. rheumatic pain and dyspepsia) is inserted for the "health concern". The MMAS-4 consists of four items with a scoring scheme of "Yes" = 0 and "No" = 1.  The items are added together to give a range of scores from low adherence to high adherence (0 to 4).

The questionnaire consists of 2 aspects: the EQ-5D descriptive system and the EQ visual analogue scale (EQ VAS). The EQ-5D descriptive system comprises the following 5 dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 3 levels: no problems, some problems and severe problems.

Osteoarthritis Index, self-administered, to report health status which is designed to capture elements of pain, stiffness and physical disability in patients with OA of the knee and/or hip joints. The index consists of 24 questions (5 questions about pain, 2 on stiffness and 17 about physical function).

Comprehensive measure of outcome in patients with a wide variety of rheumatic diseases.

Prevalence study of gastrointestinal risk factors in patients with Osteoarthritis (OA), Rheumatoid arthritis (RA) and ankylosing spondylitis (AS). - RATIONAL

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NIS-PLA-XXX-2011/1_Clinical_Study_Report

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