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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