On average among OECD countries, there are about 14 students. per teacher at the secondary level (Table D2.2). As the differences in student-teacher ratios indicate, there are fewer full-time equivalent students per full-. time equivalent teachers at the secondary level than at the primary level of education.
Causes of Lower Back Pain. Home/Conditions/Causes of Lower Back Pain. Pain in the lower back has a multitude of causes. The discs, facets, pars interarticularis, sacroiliac joints, hip joints and nerves can all cause a form of lower back pain.
A. Pancreatic pain can sometimes cause refferred pain to the waist and back in a belt-shape form. This is due to the nerve supply to the pancreas and its origin. I would also recommend to get an ultrasound of the kidney just to make sure there is no pathology there. More discussions about flank pain.