The interval for non-smokers goes from about 0.36 up to 0.48. The interval for the smokers (which starts at 0.55) and the interval for the non-smokers (which ends at 0.48) do not overlap - that is another sign that the differences seen in this study was significant. Statistical Significance and Confidence Intervals
Symptom: Swollen Neck. A goiter is an enlargement of the thyroid gland, As shown here; an enlarged thyroid can be seen as a swelling in the front of the neck. A goiter can occur both as a result of hypothyroidism and hyperthyroidism.It can sometimes also result from tumors or nodules that develop within the thyroid gland.ymptom: Swollen Neck. A goiter is an enlargement of the thyroid gland, As shown here; an enlarged thyroid can be seen as a swelling in the front of the neck. A goiter can occur both as a result of hypothyroidism and hyperthyroidism.
Thyroiditis. Thyroiditis can cause temporary hyperthyroidism followed by hypothyroidism. It is an inflammation of the thyroid gland, which may cause tenderness or pain to the neck, jaw or ears. Viruses, fever, medication, pregnancy or immune disorders may cause thyroidtitis, though often the cause is unknown.arge goiters, seen or felt at the base of the neck, may cause tightness in the throat, hoarseness, and difficulty breathing or swallowing. A swollen thyroid can increase or decrease the production of thyroid hormone and can present additional symptoms.