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Table 2 Association between education level and SBP, DBP, and concentration of LDL-C

From: Nurse-led, telephone-based secondary preventive follow-up benefits stroke/TIA patients with low education: a randomized controlled trial sub-study

  Intervention group Control group
  Education level Between-group difference (95% CI) Education level Between-group difference (95% CI)
  High Low   High Low  
SBP N = 197 N = 186   N = 186 N = 202  
 1 month, mean (SD)* 135.9 (19.4) 138.2 (15.4) NS 136.1 (17.9) 138.3 (19.7) NS
 12 months, mean (SD) 130.9 (17.9) 133.5 (15.6) NS 133.6 (16.6) 137.8 (17.7) 4.2 (0.8 to 7.6)
 Mean change between 1 and 12 months (95% CI) −4.9 (−2.1 to −7.8) −4.8 (−1.9 to −7.6)   −2.5 (−0.2 to −4.8) NS  
DBP N = 197 N = 186   N = 186 N = 202  
 1 month, mean (SD)* 81.8 (12.1) 79.2 (11.3) 2.6 (0.2 to 5.0) 81.9 (11.4) 78.9 (10.4) 3.0 (0.8 to 5.2)
 12 months, mean (SD) 78.9 (10.6) 77.2 (10.3) NS 80.8 (10.3) 79.8 (10.1) NS
 Mean change between 1 and 12 months (95% CI) −2.9 (−1.0 to −4.8) −2.1 (−0.4 to −3.7)   NS NS  
LDL-C N = 190 N = 182   N = 179 N = 197  
 1 month, mean (SD) 2.5 (0.8) 2.5 (0.8) NS 2.4 (0.8) 2.4 (0.8) NS
 12 months, mean (SD)§ 2.4 (0.9) 2.2 (0.7) 0.2 (0.1 to 0.4) 2.5 (0.8) 2.6 (1.0) NS
 Mean change between 1 and 12 months (95% CI) NS −0.3 (−0.2 to −0.4)   NS 0.2 (0.1 to 0.3)  
  1. Abbreviations: CI confidence interval, DBP diastolic blood pressure, LDL-C low-density lipoprotein cholesterol, NS not significant, SBP systolic blood pressure, SD standard deviation
  2. *In the control group, two values missing for each education level. In the intervention group, one value missing in the high-education group
  3. The LDL-C analyses did not include participants with hemorrhagic stroke as the qualifying event.
  4. In the control group, four and two values missing in the high- and low-education groups, respectively. In the intervention group, one value missing in the high-education group
  5. §In the control group, two and four values missing in the high- and low-education groups, respectively. In the intervention group, three values missing from each education level