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.
Numerous conditions can cause bilateral hip pain in women. Hip pain can be caused by hip joint structures, along with muscles, tendons and other tissues that act on or stabilize the hip joint. Some hip-related conditions occur on one side of the hip, while other conditions occur on both sides. Pain in both hips is called bilateral hip pain, and bilateral hip pain can affect both men and women.