Deaths are higher in cancer patients whose GPs do not regularly send patients through the two-week urgent referral route for suspected cancer.
If it takes more than three trips to the GP to be referred for cancer tests, patients are more likely to be dissatisfied with their overall care.
Whether or not patients see the same GP could affect how quickly bowel and lung cancers are diagnosed, according to a Cancer Research UK study.
People with cancers of the mouth and oesophagus are waiting longer between first noticing a symptom and going to their GPs than other patients.
GPs across England are set to benefit from a new partnership aimed at improving the early diagnosis of cancer.