Number and percentage of clinical blood test abnormalities by type and sex
| All (N=498) | Male (N=255) | Female (N=243) | ||||
| n/N | % (95% CI) | n/N | % (95% CI) | n/N | % (95% CI) | |
| Any abnormality | 169/489 | 34.6 (30.3 to 39.0) | 102/250 | 40.8 (34.6 to 47.2) | 67/239 | 28.0 (22.4 to 34.2) |
| Polycythaemia | 15/494 | 3.0 (1.7 to 5.0) | 11/254 | 4.3 (2.2 to 7.6) | 4/240 | 1.7 (0.5 to 4.2) |
| Anaemia | 19/494 | 3.8 (2.3 to 5.9) | 14/254 | 5.5 (3.0 to 9.1) | 5/240 | 2.1 (0.7 to 4.8) |
| Thrombocytosis | 10/492 | 2.0 (1.0 to 3.7) | 2/252 | 0.8 (0.1 to 2.8) | 8/240 | 3.3 (1.4 to 6.5) |
| Thrombocytopaenia | 11/492 | 2.2 (1.1 to 4.0) | 9/252 | 3.6 (1.6 to 6.7) | 2/240 | 0.8 (0.1 to 3.0) |
| Elevated vitamin B12 | 10/495 | 2.0 (1.0 to 3.7) | 5/253 | 2.0 (0.6 to 4.6) | 5/242 | 2.1 (0.7 to 4.8) |
| Low vitamin B12 | 16/495 | 3.2 (1.9 to 5.2) | 6/253 | 2.4 (0.9 to 5.1) | 10/242 | 4.1 (2.0 to 7.5) |
| Elevated urea | 40/497 | 8.0 (5.8 to 10.8) | 23/254 | 9.1 (5.8 to 13.3) | 17/243 | 7.0 (4.1 to 11.0) |
| Elevated creatinine | 17/497 | 3.4 (2.0 to 5.4) | 10/254 | 3.9 (1.9 to 7.1) | 7/243 | 2.9 (1.2 to 5.8) |
| Low creatinine | 41/497 | 8.2 (6.0 to 11.0) | 33/254 | 13.0 (9.1 to 17.7) | 8/243 | 3.3 (1.4 to 6.4) |
| eGFR <60* | 43/497 | 8.7 (6.3 to 11.5) | 15/254 | 5.9 (3.3 to 9.6) | 28/243 | 11.5 (7.8 to 16.2) |
| Hyperglycaemia | 21/497 | 4.2 (2.6 to 6.4) | 16/254 | 6.3 (3.6 to 10.0) | 5/243 | 2.1 (0.7 to 4.7) |
| Hypoglycaemia | 5/497 | 1.0 (0.3 to 2.3) | 1/254 | 0.4 (0.0 to 2.2) | 4/243 | 1.6 (0.5 to 4.2) |
| Elevated TSH | 13/496 | 2.6 (1.4 to 4.4) | 4/253 | 1.6 (0.4 to 4.0) | 9/243 | 3.7 (1.7 to 6.9) |
| Low TSH | 9/496 | 1.8 (0.8 to 3.4) | – | – | 9/243 | 3.7 (1.7 to 6.9) |
| Urgent action | 11/489 | 2.2 (1.1 to 4.0) | 3/250 | 1.2 (0.2 to 3.5) | 8/239 | 3.3 (1.5 to 6.5) |
NB, Participants were excluded if they had a missing value for the specific test or category being analysed.
↵*eGFR (mL/min/1.73 m2) was calculated to facilitate comparison with other studies; it was not reported back to participants.
eGFR, estimated glomerular filtration rate; TSH, thyroid stimulating hormone.