Quality of life / Placebo Effect / Public Health / Activities of Daily Living / Osteoporosis / Humans / Back Pain / Female / Male / Randomized Trial / Aged / New England / Bone Cements / Physical Function / New England Journalof Medicine / Pain Measurement / Confidence Interval / Control Group / Spinal fractures / Humans / Back Pain / Female / Male / Randomized Trial / Aged / New England / Bone Cements / Physical Function / New England Journalof Medicine / Pain Measurement / Confidence Interval / Control Group / Spinal fractures