Table 2

Interrupted Time Series Analysis for Mean Hemoglobin A1c Levels

HbA1c, % (95% CI)
ParameterAll PatientsWhiteBlackSouth Asian
Pre-QOF trend−0.21 (−0.23 to −0.18)a−0.20 (−0.24 to −0.17)a−0.21 (−0.27 to −0.15)a−0.20 (−0.26 to −0.15)a
Level change post-QOF0.04 (−0.04 to 0.12)0.07 (−0.04 to 0.18)−0.12 (−0.29 to 0.04)0.18 (0.02 to 0.34)b
Post-QOF trend0.19 (0.15 to 0.22)a0.21 (0.16 to 0.26)a0.21 (0.14 to 0.29)a0.11 (0.04 to 0.18)a
  • HbA1c=hemoglobin A1c; QOF = Quality and Outcomes Framework.

  • a P <.01.

  • b P <.05.