'We found that 10.2 per cent of those with osteoarthritis reported they had been physically abused as children in comparison to 6.5 per cent of those without osteoarthritis," says lead author Esme Fuller-Thomson of U of T's Factor-Inwentash Faculty of Social Work and Department of Family and Community Medicine. "This study provides further support for the need to investigate the possible role that childhood abuse plays in the development of chronic illness." Am I reading this right? so a 4% difference between people that are ill, and people that aren't, is proof of a causative effect of child abuse for ppl wth ill with oesteoarthritis? Am I reading it wrong. Should this 4% be relevant to anything.