For the cancers with a clear trend towards an increase or a decrease, we considered the evidence ‘strong’ when coming from more than ten good-quality studies and ‘moderate’ when coming from ten or less good-quality studies.
1
—
—
For the cancers with a clear trend towards an increase or a decrease, we considered the evidence ‘strong’ when coming from more than ten good-quality studies and ‘moderate’ when coming from ten or less good-quality studies.