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.
By Mayo Clinic Staff. Hip pain is a common complaint that can be caused by a wide variety of problems. The precise location of your hip pain can provide valuable clues about the underlying cause. Problems within the hip joint itself tend to result in pain on the inside of your hip or your groin. Hip pain on the outside of your hip, upper thigh or outer buttock is usually caused by problems with muscles, ligaments, tendons and other soft tissues that surround your hip joint. Hip pain can sometimes be caused by diseases and conditions in other areas of your body, such as your lower back.
Back pain is more common in people who are not fit. Being overweight. A diet high in calories and fat can make you gain weight. Too much weight can stress the back and cause pain. Heredity. Genes play a role in some causes of back pain, such as certain types of arthritis. Other diseases. Some types of arthritis and cancer can cause back pain. Your job. If you have to lift, push, or pull while twisting your spine, you may get back pain. If you work at a desk all day and do not sit up straight, you may also get back pain. Smoking.