Table 9aEffect of information systems on blood pressure outcomes*

Type of Information SystemMedian reduction in SBP (mmHg)Median reduction in DBP (mmHg)Median increase in proportion of patients achieving SBP in a certain rangeMedian increase in proportion of patients achieving DBP in a certain range
[inter-quartile range] [inter-quartile range] [inter-quartile range] [inter-quartile range]
N = number of comparisonsN = number of comparisonsN = number of comparisonsN = number of comparisons
All information systems 2.20.6-1.41.8
[1.1, 4.2][-1.3, 2.1][-3.6, 5.3][0.1, 4.3]
N = 1013, 22, 24, 27, 40, 43, 60, 62, 65, 68 N = 1113, 22, 24, 26, 27, 40, 43, 60, 62, 65, 68 N = 313, 25, 67 N = 626, 54, 58, 60, 68, 69
Identification of eligible participants using information systems 1.20.6NA2.0
[1.0, 1.6][0, 0.7]N=0[1.6, 5.0]
N = 427, 43, 60, 68 N = 526, 27, 43, 60, 68 N = 526, 58, 60, 68, 69
Reminders generated by existing clinical information system 2.3-1.6-3.66.0
[1.7, 3.4][-2.0, 0.2][-5.7, -1.4][5.0, 7.0]
N = 340, 60, 65 N = 340, 60, 65 N = 225, 67 N = 258, 60
Decision Support System 1.2-0.7NANA
[1.0, 1.5][-2.0, 0.6]N = 0N = 0
N = 227, 43 N = 227, 43
Audit data gathered from clinical information systems 1.51.0NA3.5
[1.3, 1.8][0.5, 1.5]N = 0[1.0, 5.5]
N = 260, 68 N = 260, 68 N = 454, 58, 60, 68
*

Some subcategories of information systems strategies are not included in this table.

When N=2, square brackets show the actual results of each study rather than interpolated inter-quartile range.

From: 3, Results

Cover of Closing the Quality Gap: A Critical Analysis of Quality Improvement Strategies (Vol. 3: Hypertension Care)
Closing the Quality Gap: A Critical Analysis of Quality Improvement Strategies (Vol. 3: Hypertension Care).
Technical Reviews, No. 9.3.
Walsh J, McDonald KM, Shojania KG, et al.

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