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Table 2 Results from the three regressions applied, segmented multiple linear regression model, for the proportion of HBP patients, and both multiples linear regressions using standard methods for interrupted time series, for the ACS and stroke outcomes

From: Cardiovascular disease and high blood pressure trend analyses from 2002 to 2016: after the implementation of a salt reduction strategy

  β (CI) t-value p-value
HBP proportion
 Overalla
  Pre-breakpoint trend (change per month) 0.004 (0.003;0.006)
  Change in trend (post-breakpoint vs pre-breakpoint) −0.006 < 0.001
  Post-breakpoint trend (change per month) −0.002 (− 0.003;-0.001)
 Malea
  Pre-breakpoint trend (change per month) − 0.003(− 0.022;0.022)
  Change in trend (post-breakpoint vs pre-breakpoint) − 0.016 0.215
  Post-breakpoint trend (change per month) −0.019(− 0.061;0.023)
 Femalea
  Pre-breakpoint trend (change per month) −0.003(− 0.028;0.022)
  Change in trend (post-breakpoint vs pre-breakpoint) − 0.016 0.215
  Post-breakpoint trend (change per month) −0.018(− 0.052;0.014)
 Age < 65a
  Pre-breakpoint trend (change per month) −0.022(− 0.798;0.754)
  Change in trend (post-breakpoint vs pre-breakpoint) 0.011 > 0.05
  Post-breakpoint trend (change per month) −0.011(− 0.039;0.017)
 Age ≥ 65a
  Pre-breakpoint trend (change per month) 0.029(−0.017;0.075)
  Change in trend (post-breakpoint vs pre-breakpoint) −0.018 > 0.05
  Post-breakpoint trend (change per month) 0.011(−0.017;0.039)
ACS crude rates (per 100,000 adults)
 Overalla
  Time of the breakpoint −0.112(− 2.041;1.817) −0.114 0.909
  Time of the breakpointa time interaction −0.031(− 0.09;0.036) −0.903 0.368
 Malea
  Time of the breakpoint 0.289(− 2.269;2.848) 0.222 0.825
  Time of the breakpointa time interaction −0.018(− 0.108;0.072) −0.393 0.695
 Femalea
  Time of the breakpoint −0.497(− 1.927;0.932) −0.682 0.496
  Time of the breakpointa time interaction 0.013(−0.034;0.060) 0.560 0.576
 Age < 65a
  Time of the breakpoint 0.151(−0.723;1.024) 0.338 0.736
  Time of the breakpointa time interaction −0.015(− 0.044;0.015) −0.986 0.325
 Age ≥ 65a
  Time of the breakpoint 0.151(− 5.159;6.721) 0.258 0.7970
  Time of the breakpointa time interaction −0.015(− 0.358;0.066) −1.349 0.1792
Stroke crude rates (per 100,000 adults)
 Overalla
  Time of the breakpoint 0.265(−1.399;1.929) 0.312 0.755
  Time of the breakpointa time interaction −0.037(− 0.091;0.016) −1.370 0.172
 Malea
  Time of the breakpoint 0.900(−0.743;2.543) 1.074 0.284
  Time of the breakpointa time interaction −0.022(− 0.074;0.030) −0.822 0.412
 Femalea
  Time of the breakpoint 0.999(−1.204;3.202) 0.888 0.376
  Time of the breakpointa time interaction −0.047(− 0.121;0.027) −1.244 0.215
 Age < 65a
  Time of the breakpoint 0.448(−0.261;1.157) 1.238 0.217
  Time of the breakpointa time interaction −0.014(− 0.037;0.009) −1.207 0.229
 Age ≥ 65a
  Time of the breakpoint 2.548(− 5.351;10.446) 0.632 0.528
  Time of the breakpointa time interaction −0.238(− 0.502;0.026) −1.764 0.079
  1. Values not presented in the table (−) are not available for the type of regression
  2. β represents the coefficients in the regression
  3. HBP High blood pressure, ACS Acute coronary syndrome, CI confidence interval
  4. aAll models were adjusted for seasonality