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The Frailty Problem Nobody Could See

A Cog and Cuppa case study in turning data into decisions

9 May 2026 · Read the essay →

The outside claims this piece leans on, and where they come from. Each note says what the source looked at, so you can judge how far it stretches.

  1. The frail population is a small share of registered patients but accounts for a disproportionate share of emergency admissions, ambulance callouts and unplanned care costs

    Clegg A et al. (2016) Development and validation of an electronic frailty index, Age and Ageing 45(3):353-360; Han L, Clegg A, Doran T, Fraser L (2019) The impact of frailty on healthcare resource use, Age and Ageing 48(5):665-671 (2016; 2019)

    eFI development: ~930,000 English patients aged 65-95 (2008 cohort), emergency admission risk by frailty category. Han 2019: 95,863 patients aged 65-95 in CPRD, annual NHS costs by eFI category (2013/14 prices).