Accuracy of drug store blood pressure monitors
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Bibliographic record
Abstract
OBJECTIVES: Publically accessible blood pressure monitors are widely used, but little information is available on their accuracy. We compared blood pressure readings of 17 drug store monitors with those obtained using a validated home monitor (Omron BP742CAN) and both with those taken at home using the Canadian Hypertension Education Program protocol. MATERIALS AND METHODS: Duplicate readings were taken using the drug store monitor (VitaStat, n=6, and PharmaSmart, n=11) on the left arm and the Omron on the right in three participants: two normal and one untreated hypertensive patient. We used Bland-Altman methods for comparison. We explored the correlation with average home blood pressure readings. RESULTS: Home average blood pressure for our three participants was 121±6/73±5, 106±6/62±4, and 142±8/81±7 mmHg. The mean systolic blood pressure difference (drug store-Omron) was -1.8±8.2 mmHg. Diastolic pressure difference was 1.7±5.6. Individual paired systolic differences varied from -19 to 14 mmHg. For the participant who required a large cuff, drug store systolic readings tended to be higher (4.1±6.7). In our three participants, drug store monitors as a group read higher than home systolic blood pressure: 7.5 [95% confidence interval (CI) 1.5-13.4], 1.2 (95% CI -4.0 to 6.4), and 1.0 (95% CI -2.5 to 4.4) mmHg. Diastolic blood pressure and heart rate differences were similar in magnitude. CONCLUSION: On average, drug store monitors recorded lower systolic blood pressures and higher diastolic blood pressures than a validated monitor, but the difference was neither statistically nor clinically significant. Single reading comparisons showed a much broader range. In three participants, drug store monitors did reflect the average home blood pressure.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it