Research Article
Variability in Test Interval Is Linked to Glycated Haemoglobin (HbA1c) Trajectory over Time
(a) |
| | PAT | UHNM |
| | Number of patients | 56,809 | 27,063 | | Male (%) | 51.5 | 54.9 | | Age (years) | 61 | (51, 70) | 66 | (58, 73) | | Baseline HbA1c: (%) | 6.6 | (6.0, 7.7) | 7.1 | (6.5, 8.0) | | : (mmol/mol) | 49 | (42, 61) | 54 | (48, 64) | | Time between baseline and last test (years) | 4.95 | (4.84, 5.06) | 4.95 | (4.85, 5.06) | | Change in HbA1c between baseline and last test: (%) | −0.1 | (−0.5, +0.4) | −0.2 | (−0.7, +0.4) | | : (mmol/mol) | −1 | (−5, +4) | −2 | (−7, +4) | | Number of tests | 9 | (7, 11) | 9 | (7, 12) |
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(b) |
| | Baseline HbA1c; % (mmol/mol) | Number of patients (%) | | PAT | UHNM |
| | <5.0 (<30) | 218 | 0.4% | 24 | 0.1% | | 5.0–5.9 (30–41) | 12,679 | 22.3% | 1,281 | 4.7% | | 6.0–6.5 (42–47) | 12,578 | 22.1% | 4,900 | 18.1% | | 6.5–7.0 (48–53) | 10,611 | 18.7% | 6,699 | 24.8% | | 7.0–7.5 (54–58) | 5,589 | 9.8% | 4,370 | 16.1% | | 7.5–9.0 (59–75) | 8,372 | 14.7% | 6,315 | 23.3% | | 9.1–10.0 (76–86) | 2,581 | 4.5% | 1,575 | 5.8% | | >10.0 (>86) | 4,181 | 7.4% | 1,899 | 7.0% | | Total | 56,809 | 100.0% | 27,063 | 100.0% |
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Results expressed as median (interquartile range). PAT: Pennine Acute Hospitals NHS Trust; UHNM: University Hospitals of North Midlands. |
