A finger prick instead of a needle: could At-Home blood tests match hospital accuracy?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: Eligible participants are individuals who require routine venous blood sampling as part of their usual clinical care and who represent clinical populations in which remote capillary blood sampling may improve access to monitoring or patient experience. All participants must: * Be attending a routine clinical appointment during which venous blood sampling is planned as part of standard clinical care for disease monitoring or therapeutic drug monitoring. * Be willing and able to undertake capillary blood sampling independently or with appropriate assistance. Adult participants must: * Be aged ≥18 years of age. * Have capacity to provide written informed consent. Paediatric participants must: * Be aged 6-15 years of age. * If aged 6-11, be attending with a parent or legal guardian able to provide written informed consent and provide age-appropriate assent where applicable. * If aged 12-15: be attending with a parent or legal guardian able to provide written informed consent and provide age-appropriate assent where applicable OR if deemed to have capacity themselves, be able to provide written informed consent and be attending with a parent or legal guardian who agrees to their participation. Additional eligibility criteria Autoimmune disease group: participants must have a diagnosis of immune-mediated disease based on the assessment of their treating clinician. Transplant recipient group: participants must be the recipient of a functioning kidney, kidney-pancreas, or islet transplant. Mental health group: participants must have a diagnosis of a mental health disorder based on the assessment of their treating clinician. Paediatric group: participants must be attending a paediatric clinic and require blood sampling as part of standard clinical care. Exclusion Criteria: * Inability or unwillingness to provide informed consent, or, for paediatric participants, absence of parental or legal guardian consent or age-appropriate assent where applicable. * Skin disease, infection, injury, or other local factors at the intended sampling site that would make capillary blood collection unsafe or impractical. * Known allergy or hypersensitivity to any materials used in the capillary blood sampling devices. * Inability to undertake the capillary sampling procedures independently or with appropriate assistance.