Table 3: Linear mixed-effect model analysis of factors affecting systolic blood pressure change.

VariablesEstimation (β)Standard error (SE) value95% CI
Lower limitUpper limit

-intercept147.38 13.18 11.19 <0.001 121.14 173.63
Group
 Experimental/control group (control group = 0) 10.63 3.55 3.00 0.004 3.58 17.69
Gender
 Male/female (female = 0)1.17 3.39 0.35 0.731 −5.58 7.92
Medication taken within last 8 h
 Yes/no (no = 0) −3.27 3.56−0.92 0.360 −10.36 3.81
Age0.01 0.21 0.64 0.524 −0.28 0.55
30 min after /before (before )0.90 1.44 0.620.533 −1.94 3.74
15 min after /before (before )0.00 1.20 0.001.000 −2.36 2.36
Immediately after /before (before ) −1.13 0.86−1.310.192 −2.82 0.57
Group time 3 (30 min after /before )−23.03 2.04−11.28<0.001−27.04−19.01
Group time 2 (15 min after /before )−19.25 1.69−11.37<0.001−22.58−15.92
Group time 1 (immediately after /before )−13.50 1.22−11.11<0.001−15.90−11.11

Linear mixed-effect model for repeated measures; . time 1, time between preacupressure and immediately after acupressure; time 2, time between preacupressure and 15 min after acupressure; time 3, time between preacupressure and 30 min after acupressure. CI, confidence interval; , acupressure.