Hypothyroidism and Hair Loss

Good day doctor, I was reading a short article about hypothyroidism, and I was left with a few lingering thoughts. Perhaps you might be able to answer my questions:

a) Would you say that hair loss due to hypothyroidism is a common or a rare incidence among those who suffer from hair loss?
b) Or, among the various symptoms of hypothyroidism, is hair loss a common or rare occurrence?

I understand that there may not be good statistics to answer these questions, but perhaps you might be able to shed some light, based on your experience.

Hair loss is one of many symptoms of hypothyroidism, but the frequency of it is not reported. Patients suffering from hypothyroidism usually have other symptoms along with hair loss, including weight gain, cold intolerance, fatigue, weakness, constipation, and depression. The diagnosis of hypothyroidism is made through blood testing for the level of T4 (the main thyroid hormone) and TSH (thyroid stimulating hormone).

Most of the patients in our practice suffer from male pattern baldness (MPB). Patients concerned about hair loss should have a miniaturization study to determine if the pattern is consistent with MPB or if there is an underlying medical condition causing the hair loss.