All that glitters may not be gold standard

A large proportion of what doctors consider gold-standard medicine at any given time later gets proven to be ineffective or even harmful, a study suggests.

When challenged by high-level research, some 40% of existing medical practices are found to be of no benefit and 17% to be of inconclusive benefit, US doctors have shown.

Cutting-edge new practices fare better but still worse than one might think: just 56% are conclusively demonstrated to be