highly significantP value < 0.001
McMillan 2007 found that caregivers overestimated symptom intensity for pain (the difference in mean scores was 1.33 in a 0 to 10 scale), breathlessness (0.78 difference in mean scores in a 0 to 10 scale) and constipation (1.08 difference in mean scores in 0 to 16 scale); all three differences were highly significant (paired t‐tests; P value < 0.001).