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Published Online First: 27 April 2006. doi:10.1136/jcp.2005.033217
Journal of Clinical Pathology 2007;60:705-708
Copyright © 2007 by the BMJ Publishing Group Ltd & Association of Clinical Pathologists.

ORIGINAL ARTICLE

The relationship between an inflammation-based prognostic score (Glasgow Prognostic Score) and changes in serum biochemical variables in patients with advanced lung and gastrointestinal cancer

D J F Brown1, R Milroy2, T Preston3 and D C McMillan4

1 St Columba’s Hospice, Edinburgh, UK
2 Department of Respiratory Medicine, Stobhill Hospital, Glasgow, UK
3 SUERC, East Kilbride, Glasgow
4 University Department of Surgery, Royal Infirmary, Glasgow

Correspondence to:
Correspondence to:
D J F Brown
St Columba’s Hospice, 15 Boswall Road, Edinburgh EH5 3RW, UK; dbrown{at}stcolumbashospice.org.uk

Background: The Glasgow Prognostic Score (GPS), an inflammation-based prognostic score formed from standard thresholds of C reactive protein (CRP) and albumin, has prognostic value in patients with advanced cancer. Little is known about the general biochemical disturbance associated with the systemic inflammatory response in cancer.

Aim: To examine the relationship between the GPS and blood biochemistry in patients with advanced lung and gastrointestinal cancer.

Methods: The GPS (albumin <35 g/l = 1 and CRP >10 mg/l = 1 combined to form a prognostic score of 0 (normal) and 1 or 2 (abnormal)) and a variety of biochemical variables were examined in patients (n = 50) with advanced lung or gastrointestinal cancer and in a healthy control group (n = 13).

Results: The GPS was normal in all the controls, but abnormal in 78% of the cancer group. Serum levels of sodium, chloride, creatine kinase, zinc and vitamin D were lower in the cancer group (all p<0.01), whereas levels of calcium, copper (both p<0.05), alkaline phosphatase, {gamma}-glutamyl transferase (both p<0.001) and lactate dehydrogenase (p<0.10) were raised. In the patient group, with increasing GPS, there was a median reduction in Karnofsky Performance Status (25%), haemoglobin (22%), sodium (3%), zinc (15%) and survival (93%, all p<0.05) and a median increase in white cell count (129%), alkaline phosphatase (217%), {gamma}-glutamyl transferase (371%) and lactate dehydrogenase (130%, all p<0.05). CRP levels were strongly and similarly correlated with alkaline phosphatase and {gamma}-glutamyl transferase, accounting for more than 25% of the variation in their activities.

Conclusion: Several correlations were seen between biochemical variables and increasing GPS. In particular, chronic activation of the systemic inflammatory response in cancer was associated with increase in {gamma}-glutamyl transferase and alkaline phosphatase activity in patients with advanced lung and gastrointestinal cancer.

Abbreviations: CRP, C reactive protein; GPS, Glasgow Prognostic Score; KPS, Karnofsky Performance Status


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