Key result
Blood pressure monitor outputs displaying both numbers and colors significantly improved pregnant women's correct identification of blood pressure values compared to numbers alone (IRR 1.10).
Why the study?
Patient-performed home blood pressure monitoring has not been widely implemented in low- and middle-income countries, and sufficient patient numeracy to interpret blood pressure values is critical for its success.
Does providing both numerical and color-coded output improve correct identification of elevated blood pressure values in pregnant women engaged in home blood pressure monitoring?
Population
80 pregnant women at a tertiary hospital in Accra, Ghana
Comparison
Blood pressure monitor outputs with numbers only vs both numbers and colors
Follow-up
2 to 4 weeks
Authors
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Supports color-coded BP outputs for home monitoring in pregnancy; leaves open impact on outcomes pending randomized trials.
Cross-Sectional (n=80)
No
Does providing both numerical and color-coded output improve correct identification of elevated blood pressure values in pregnant women engaged in home blood pressure monitoring?
Relative Risk: 1.1 (95% CI 1.05–1.15)
Absolute Event Rate: 7.19% vs 6.54%
p-value: p=<0.001
In pregnant women engaged in home blood pressure monitoring, providing monitors with both numerical and color-coded outputs significantly improves the accurate identification of elevated blood pressure values.
Lawrence et al. (2025) conducted a cross-sectional in Hypertensive disorders of pregnancy (n=80). Blood pressure monitor outputs with both numbers and colors vs. Blood pressure monitor outputs with numbers only was evaluated on Correct identification of blood pressure monitor outputs (out of 8) (IRR 1.10, 95% CI 1.05-1.15, p=<0.001). Blood pressure monitor outputs displaying both numbers and colors significantly improved pregnant women's correct identification of blood pressure values compared to numbers alone (IRR 1.10).
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