Table 4

Interrupted Time Series Analysis for Mean Systolic and Diastolic Blood Pressure

Blood Pressure, mm Hg (95% CI)
ParameterAll PatientsWhiteBlackSouth Asian
Systolic
 Pre-QOF trend−0.03 (−0.31 to 0.25)−0.50 (−0.93 to −0.08)a0.31 (−0.20 to 0.83)0.42 (−0.16 to 1.01)
 Level change post-QOF−1.95 (−2.87 to −1.02)b−2.12 (−3.48 to −0.77)b−2.32 (−4.03 to −0.61)b−1.08 (−2.97 to 0.08)
 Post-QOF trend−1.04 (−1.42 to −0.64)b−0.21 (−0.80 to 0.37)−1.68 (−2.41 to −0.95)b−1.79 (−2.60 to −0.98)b
Diastolic
 Pre-QOF trend−0.84 (−1.00 to −0.67)b−0.69 (−0.93 to −0.44)b−0.84 (−1.14 to −0.54)b−1.06 (−1.41 to −0.72)b
 Level change post-QOF−0.51 (−1.05 to 0.01)−1.01 (−1.79 to −0.24)a−0.33 (−1.32 to 0.65)0.20 (−0.90 to 1.30)
 Post-QOF trend0.19 (−0.03 to 0.41)0.10 (−0.23 to 0.43)0.12 (−0.30 to 0.54)0.40 (−0.07 to 0.87)
  • QOF = Quality and Outcomes Framework.

  • a P <.05

  • b P <.01