Older age and risk for delayed abdominal pain care in the emergency department.

Background and importance: Suboptimal acute pain care has been previously reported to be associated with demographic characteristics.

Objectives: The aim of this study was to assess a healthcare system's multi-facility database of emergency attendances for abdominal pain, to assess for an association between demographics (age, sex, and ethnicity) and two endpoints: time delay to initial analgesia (primary endpoint) and selection of an opioid as the initial analgesic (secondary endpoint).

Design, setting, and participants: This retrospective observational study assessed four consecutive months' visits by adults (≥18 years) with a chief complaint of abdominal pain, in a UK National Health Service Trust's emergency department (ED). Data collected included demographics, pain scores, and analgesia variables.

Outcome measures and analysis: Categorical data were described with proportions and binomial exact 95% confidence intervals (CIs). Continuous data were described using median (with 95% CIs) and interquartile range (IQR). Multivariable associations between demographics and endpoints were executed with quantile median regression (National Health Service primary endpoint) and logistic regression (secondary endpoint).

Main results: In 4231 patients, 1457 (34.4%) receiving analgesia had a median time to initial analgesia of 110 min (95% CI, 104-120, IQR, 55-229). The univariate assessment identified only one demographic variable, age decade ( P = 0.0001), associated with the time to initial analgesia. Association between age and time to initial analgesia persisted in multivariable analysis adjusting for initial pain score, facility type, and time of presentation; for each decade increase the time to initial analgesia was linearly prolonged by 6.9 min (95% CI, 1.9-11.9; P = 0.007). In univariable assessment, time to initial analgesia was not associated with either detailed ethnicity (14 categories, P = 0.109) or four-category ethnicity ( P = 0.138); in multivariable analysis ethnicity remained non-significant as either 14-category (all ethnicities' P ≥ 0.085) or four-category (all P ≥ 0.138). No demographic or operational variables were associated with the secondary endpoint; opioid initial choice was associated only with pain score ( P = 0.003).

Conclusion: In a consecutive series of patients with abdominal pain, advancing age was the only demographic variable associated with prolonged time to initial analgesia. Older patients were found to have a linearly increasing, age-dependent risk for prolonged wait for pain care.