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This study was undertaken by sending a questionnaire to 148 people suffering from irritable bowel syndrome (IBS). The respondents all were members of the IBS Network, a national independent organization formed to help alleviate the suffering and distress of people diagnosed as having irritable bowel. They were asked about their symptoms, the medical tests they had undergone, how they felt about the treatment they received, and how IBS affected their lives. The study found that IBS affected all aspects of their lives: work, leisure, travel and relationships. Sufferers indicated that they felt they would have coped better if they had been provided with more information about IBS, its possible causes and treatment, and greater sensitivity from members of the medical profession in dealing with them.

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Recent research has shown that people with chronic illnesses often experience cognitive deficits, such deficits may be specific to a particular type of illness, reflecting the disease process itself, or they may be deficits that are common across a number of chronic illnesses. Our study investigated whether people with an organic disease (Inflammatory Bowel Disease) show cognitive dysfunction relative to the control group and people with a functional illness (Irritable Bowel Syndrome), and if so, to elucidate the mechanisms by which such dysfunction occurs. A quasi-experimental design using three groups of participants provided scores on IQ, memory, and cognitive flexibility. Differences in absolute scores were slight. However, a noticeable interaction effect was found between group and IQ: The illness groups showed a deficit in verbal IQ relative to both their own performance IQ and to that of the control group's verbal IQ. This verbal deficit cannot be explained by depression, cognitive load, or medication.

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