Please select the eligibility criteria that correspond to the clinical trial below.
Title: Dietary Linoleic Acid for Secondary Prevention of Coronary Heart Disease and Death in the Sydney Heart Study: a Randomized Controlled Dietary Trial
Brief Summary: The substitution of polyunsaturated fatty acids (PUFA) for saturated fatty acids (SFA) is a cornerstone of worldwide dietary advice for coronary heart disease (CHD) risk reduction. However, clinical CHD benefits specific to the omega-6 PUFA linoleic acid (LA), and distinct from omega-3 PUFAs, have not been established. The Sydney Diet-Heart Study (SDHS; 1966-1973) was a randomized controlled secondary CHD prevention trial testing whether selectively increasing omega-6 LA from safflower oil in place of SFA reduced CHD and improved survival. A full analysis of mortality outcomes has not been published. The investigators recovered the original SDHS dataset, which included detailed longitudinal dietary, smoking and coded mortality data, permitting evaluation of smoking relapse rates, and all-cause, CVD and CHD mortality outcomes by nutrient intake and duration of diet exposure. Data recovery also permitted the first complete meta-analysis of LA intervention trials on mortality outcomes.

Objectives are (1) to evaluate whether increasing dietary linoleic acid alters CVD and CHD mortality, and (2) to assess whether changes in smoking relapse rates contribute to observed mortality differences.


Options:
A: Inclusion Criteria:

1. Male or female subject, age 17 or older; country-specific age limitations will be followed
2. Diagnosis of Crohn's disease confirmed by radiological studies or endoscopy or surgical pathology within 36 months prior to randomisation
3. In remission for at least 3 months, but no longer than 12 months; remission being defined as meeting both of the two conditions: (1) clinically in remission with a CDAI of less than 150 and (2) off steroids and/or immunosuppressants for at least 3 months, if remission had been induced with such medications

Exclusion Criteria:

1. Intolerance of omega-3 fatty acids or known allergy to fish or fish products
2. Ongoing CD therapy with: 5-ASA compounds, steroids, immune modifiers, systemic antibiotics, tube feeding, defined formula diets or parenteral nutrition
3. In 3 months prior to randomisation received: systemic steroid therapy, azathioprine, 6-mercaptopurine, methotrexate, cyclosporine, probiotic products or preparations containing fish oil
4. In 12 months prior to randomisation received: biologicals e.g. enbrel, infliximab, mycophenolate, tacrolimus, thalidomide, other immune modifiers and/or investigational products
5. Chronic use of narcotics for pain control (opiates for diarrhoea are acceptable)
6. Documented short bowel syndrome, ostomy
7. Need for bowel surgery for CD, bowel obstruction or resection in past 3 months (a subject who had a bowel resection in the past must have had at least one relapse after the surgery)
8. Malignancy and/or clinically significant impairment in cardiac, liver or renal function, CNS, pulmonary, hematological, immunological, vascular and gastrointestinal disease in addition to CD
9. Known alcoholism or drug abuse
10. Any medical conditions which, in the investigator's opinion, may interfere with the evaluation of the trial medication
11. Any of the following laboratory abnormalities:

    * White blood count \< 3 x 109/L
    * Lymphocyte count \< 0.5 x 109/L
    * Haemoglobin \< 80 g/L
    * Platelet count \< 125 x 109/L or \> 800 x 109/L
    * ALT or AST \> 2.0 times the upper limit of normal
    * Alkaline Phosphatase \> 2.0 times the upper limit of normal
    * Serum Creatinine \> 1.5 times the upper limit of normal
B: Inclusion Criteria:

* Clinical diagnosis of myocardial infarction, angina, or coronary insufficiency
* Willingness to attend Coronary Clinic in Sydney Australia on a regular basis
C: Inclusion Criteria:

* 63 to 79 years old
* healthy men and women
* able to attend clinic at a study sites

Exclusion Criteria:

* illiteracy or inability to understand the protocol
* unable to undergo neurophysiological tests
* morbid obesity (BMI greater than or equal to ≥ 40 kg/m2)
* uncontrolled diabetes (HbA1c\>85)
* uncontrolled hypertension
* prior cerebrovascular accident
* any relevant psychiatric illness, including major depression
* advanced cognitive deterioration, dementia
* other neurodegenerative diseases (i.e. Parkinson's disease)
* any chronic illness expected to shorten survival (heart, liver, cancer, etc)
* bereavement in the first year of loss
* bad dentures unless fixable dental prostheses are used
* allergy to walnuts
* customary us of fish oil or flaxseed oil supplements
* eye related exclusion criteria
D: Inclusion Criteria:

* Men and women between the ages of 50 and 85 years
* Macular status ranges from large drusen in both eyes or large drusen in one eye and advanced AMD (neovascular AMD or geographic atrophy) in the fellow eye

Exclusion Criteria:

* Ocular media not clear enough to allow good fundus photography

Answer: B