Objectives Primary objectives were to determine the relationship between prevalence of symptom documentation and intervention provision, and increasing severity of bothersome symptoms, as identified by guardians using guardian-reported Symptom Screening in Pediatrics Tool (proxy-SSPedi), which is validated and measures the extent of bothersome symptoms in paediatric patients with cancer.

Methods We included guardians of children 2–7 years of age receiving cancer treatments and seen in hospital daily for 4 consecutive days. Guardians reported proxy-SSPedi at study enrolment and 3 days later. Chart review was performed between the day prior and the day following proxy-SSPedi completion. Symptom documentation and intervention provision were determined by two independent abstractors.

Results We enrolled 190 guardians who provided 371 proxy-SSPedi assessments in 190 children. The most common severely bothersome symptoms were ‘feeling tired’, ‘feeling more or less hungry than they usually do’ and ‘feeling cranky or angry’. Among those with increasing severity of bother, documentation was significantly more common for 12 symptoms while intervention was significantly more common for 7 symptoms. Intervention was not significantly more common with increasing severity of bother due to ‘feeling tired’, ‘feeling more or less hungry than they usually do’ and ‘feeling cranky or angry’.

Conclusions Symptom documentation was generally more common in patients with severely bothersome symptoms. Intervention was not more common among those with increasing severity of bother due to fatigue, changes in hunger or anger, which were the most common severely bothersome symptoms. Future efforts should focus on facilitating intervention provision to patients with bothersome symptoms.