What are the chances of a hernia become strangulated?

What are the chances of a hernia become strangulated? After 3 months the cumulative probability of strangulation for inguinal hernias was 2.8 per cent , rising to 4.5 per cent after 2 years. For femoral hernias the cumulative probability of strangulation was 22 per cent at 3 months and 45 ...