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.
Without examining you it is difficult to tell the exact cause, but generally speaking pain in and around the hip joint can be referred from the lower back or related to the hip itself. You mention that you have had back pain in the past and therefore it is possible that your hip pain is related to 'wear and tear' in the lower spine.