Rafiq, Meena;
Abel, Gary;
Renzi, Cristina;
Lyratzopoulos, Georgios;
(2022)
Inflammatory marker testing in primary care in the year before Hodgkin lymphoma diagnosis: a UK population-based case-control study in patients aged ≤50 years.
British Journal of General Practice
10.3399/BJGP.2021.0617.
(In press).
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Abstract
BACKGROUND: Proinflammatory conditions are associated with increased risk of Hodgkin lymphoma, although the neoplastic process per se often induces an inflammatory response. AIM: To examine pre-diagnostic inflammatory marker test use to identify changes that may define a 'diagnostic window' for potential earlier diagnosis. DESIGN AND SETTING: This was a matched case-control study in UK primary care using Clinical Practice Research Datalink data (2002-2016). METHOD: Primary care inflammatory marker test use and related findings were analysed in 839 Hodgkin lymphoma patients and 5035 controls in the year pre-diagnosis. Poisson regression models were used to calculate monthly testing rates to examine changes over time in test use. Longitudinal trends in test results and the presence/absence of 'red-flag' symptoms were examined. RESULTS: In patients with Hodgkin lymphoma, 70.8% (594/839) had an inflammatory marker test in the year pre-diagnosis versus 16.2% (816/5035) of controls (odds ratio 13.7, 95% CI = 11.4 to 16.5, P<0.001). The rate of inflammatory marker testing and mean levels of certain inflammatory marker results increased progressively during the year pre-diagnosis in Hodgkin lymphoma patients while remaining stable in controls. Among patients with Hodgkin lymphoma with a pre-diagnostic test, two-thirds (69.5%, 413/594) had an abnormal result and, among these, 42.6% (176/413) had no other 'red-flag' presenting symptom/sign. CONCLUSION: Increases in inflammatory marker requests and abnormal results occur in many patients with Hodgkin lymphoma several months pre-diagnosis, suggesting this period should be excluded in aetiological studies examining inflammation in Hodgkin lymphoma development, and that a diagnostic time window of appreciable length exists in many patients with Hodgkin lymphoma, many of whom have no other red-flag features.
| Type: | Article |
|---|---|
| Title: | Inflammatory marker testing in primary care in the year before Hodgkin lymphoma diagnosis: a UK population-based case-control study in patients aged ≤50 years |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3399/BJGP.2021.0617 |
| Publisher version: | https://doi.org/10.3399/BJGP.2021.0617 |
| Language: | English |
| Additional information: | © The Authors http://creativecommons.org/licenses/by/4.0/ This article is Open Access: CC BY 4.0 licence (http://creativecommons.org/licences/by/4.0/). |
| Keywords: | Hodgkin lymphoma, blood tests, diagnostic time window, general practice, inflammatory markers |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health > Behavioural Science and Health UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10152431 |
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