{
  "name": "Digital Health Metrics",
  "description": "A reference book of digital health metric definitions: what each metric means, how to calculate it, a worked example, data sources and caveats, and common pitfalls, organised for people building, running, and evaluating digital health products and services.",
  "url": "https://digital-health-metrics.github.io/",
  "repository": "https://github.com/digital-health-metrics/digital-health-metrics",
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    "Topic slugs are translated per locale; match the same topic across locales by content, not slug.",
    "Non-English locales are AI-assisted translations pending native review."
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      "label": "Íslenska - Ísland",
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    },
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      "code": "zh-tw",
      "label": "中文 - 台灣",
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      "direction": "ltr"
    },
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  ],
  "parts": [
    {
      "name": "Patient engagement and access",
      "topics": [
        {
          "title": "Patient portal adoption rate",
          "slug": "patient-portal-adoption-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/patient-portal-adoption-rate/",
          "summary": "registration, activation, and active use; three different rates too often conflated as one"
        },
        {
          "title": "Telehealth visit rate",
          "slug": "telehealth-visit-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/telehealth-visit-rate/",
          "summary": "the share of care delivered remotely, and why video and telephone should never be reported as one number"
        },
        {
          "title": "Appointment no-show rate",
          "slug": "appointment-no-show-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/appointment-no-show-rate/",
          "summary": "the oldest operational metric in healthcare, and one of the best-evidenced targets for digital reminders"
        },
        {
          "title": "Patient engagement consistency rate",
          "slug": "patient-engagement-consistency-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/patient-engagement-consistency-rate/",
          "summary": "how regularly a patient interacts with a digital tool over time, as distinct from whether they have used it at all"
        },
        {
          "title": "User retention rate",
          "slug": "user-retention-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/user-retention-rate/",
          "summary": "the cohort retention curve that separates a product with a sustainable use pattern from one riding a wave of novelty"
        },
        {
          "title": "DAU/MAU stickiness ratio",
          "slug": "dau-mau-stickiness-ratio",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/dau-mau-stickiness-ratio/",
          "summary": "the standard product-analytics measure of engagement intensity across a whole user base"
        },
        {
          "title": "Patient Net Promoter Score",
          "slug": "patient-net-promoter-score",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/patient-net-promoter-score/",
          "summary": "the widely used, and widely criticized, single-question satisfaction metric"
        },
        {
          "title": "System Usability Scale score",
          "slug": "system-usability-scale-score",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/system-usability-scale-score/",
          "summary": "a standardised 10-item questionnaire quantifying how usable a piece of software actually is"
        }
      ]
    },
    {
      "name": "Digital care operations and safety",
      "topics": [
        {
          "title": "Clinical alert override rate",
          "slug": "clinical-alert-override-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/clinical-alert-override-rate/",
          "summary": "the standard signal for alert fatigue in clinical decision support"
        },
        {
          "title": "Digital referral turnaround time",
          "slug": "digital-referral-turnaround-time",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/digital-referral-turnaround-time/",
          "summary": "the process metric that shows whether an e-referral system is actually saving time"
        },
        {
          "title": "Time to intervention",
          "slug": "time-to-intervention-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/time-to-intervention-rate/",
          "summary": "how quickly a clinical team responds to an automated health alert"
        },
        {
          "title": "Bed-day reduction",
          "slug": "bed-day-reduction",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/bed-day-reduction/",
          "summary": "inpatient bed days saved by shifting recovery to a virtual ward, always reported alongside a safety metric"
        }
      ]
    },
    {
      "name": "Clinical outcomes and quality",
      "topics": [
        {
          "title": "Biometric improvement rate",
          "slug": "biometric-improvement-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/biometric-improvement-rate/",
          "summary": "the share of patients achieving a clinically meaningful change in a tracked biometric such as HbA1c or BMI"
        },
        {
          "title": "Biometric stabilization rate",
          "slug": "biometric-stabilization-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/biometric-stabilization-rate/",
          "summary": "sustained control within a target range, as distinct from a one-off improvement"
        },
        {
          "title": "Triage routing accuracy",
          "slug": "triage-routing-accuracy",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/triage-routing-accuracy/",
          "summary": "whether an AI or digital triage tool correctly routes a patient to the right level of care"
        },
        {
          "title": "Medication adherence rate",
          "slug": "medication-adherence-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/medication-adherence-rate/",
          "summary": "the proportion of days a patient had access to their medication as prescribed"
        },
        {
          "title": "Hospital readmission rate",
          "slug": "hospital-readmission-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/hospital-readmission-rate/",
          "summary": "the metric most directly tied to payer economics and value-based care contracts"
        },
        {
          "title": "ePROM completion rate",
          "slug": "epro-completion-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/epro-completion-rate/",
          "summary": "the completion rate for electronic patient-reported outcome measures, and why a declining rate can itself be a clinical signal"
        }
      ]
    },
    {
      "name": "Marketing and growth economics",
      "topics": [
        {
          "title": "True customer acquisition cost",
          "slug": "true-customer-acquisition-cost",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/true-customer-acquisition-cost/",
          "summary": "the fully loaded cost of acquiring one new patient, commonly undercounted by 30-50%"
        },
        {
          "title": "LTV to CAC ratio",
          "slug": "ltv-to-cac-ratio",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/ltv-to-cac-ratio/",
          "summary": "lifetime value against true acquisition cost; 3:1 is the widely cited sustainable baseline"
        },
        {
          "title": "Marketing efficiency ratio",
          "slug": "marketing-efficiency-ratio",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/marketing-efficiency-ratio/",
          "summary": "total revenue over total marketing spend, an independent check against platform-reported ROAS"
        }
      ]
    },
    {
      "name": "Digital health equity",
      "topics": [
        {
          "title": "Digital access rate",
          "slug": "digital-access-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/digital-access-rate/",
          "summary": "the precondition metric for every other digital health measure in this book"
        },
        {
          "title": "Digital literacy rate",
          "slug": "digital-literacy-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/digital-literacy-rate/",
          "summary": "whether patients who do have access can actually use it unaided"
        }
      ]
    },
    {
      "name": "Technical and operational infrastructure",
      "topics": [
        {
          "title": "Physician burnout rate",
          "slug": "physician-burnout-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/physician-burnout-rate/",
          "summary": "tracked alongside clinician-facing digital tool burden, since badly designed software is a documented contributor"
        },
        {
          "title": "Device uptime rate",
          "slug": "device-uptime-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/device-uptime-rate/",
          "summary": "the foundational infrastructure metric underneath every remote monitoring programme"
        }
      ]
    },
    {
      "name": "Financial and economic value",
      "topics": [
        {
          "title": "Cost per episode of care",
          "slug": "cost-per-episode-of-care",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/cost-per-episode-of-care/",
          "summary": "the standard unit of financial comparison in value-based care contracts"
        },
        {
          "title": "Emergency department diversion rate",
          "slug": "ed-diversion-rate",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/ed-diversion-rate/",
          "summary": "patient contacts safely redirected away from the ED, always reported alongside a missed-emergency safety metric"
        },
        {
          "title": "Return on investment (ROI) and value on investment (VOI)",
          "slug": "roi-and-voi",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/roi-and-voi/",
          "summary": "whether a digital investment paid for itself financially, and whether it was worth doing accounting for everything that matters"
        }
      ]
    },
    {
      "name": "Evaluation frameworks",
      "topics": [
        {
          "title": "RE-AIM framework",
          "slug": "re-aim-framework",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/re-aim-framework/",
          "summary": "Reach, Effectiveness, Adoption, Implementation, and Maintenance; five dimensions rather than one metric"
        },
        {
          "title": "WHO Digital Health Assessment Framework",
          "slug": "who-digital-health-assessment-framework",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/who-digital-health-assessment-framework/",
          "summary": "WHO's guidance for assessing feasibility, safety, and equity across national-scale deployments"
        },
        {
          "title": "ISO/TS 82304-2",
          "slug": "iso-ts-82304-2",
          "url": "https://digital-health-metrics.github.io/en-gb/topics/iso-ts-82304-2/",
          "summary": "the international technical specification behind most health and wellness app quality labels"
        }
      ]
    }
  ]
}