Skip to main content

Table 4 Mean differences (95% confidence intervals) and p values of group comparisons*

From: Cost-effectiveness of tailored print communication, telephone motivational interviewing, and a combination of the two: results of an economic evaluation alongside the Vitalum randomized controlled trial

Costs TPC vs. combined TPC vs. TMI TPC vs. control combined vs. TMI combined vs. control TMI vs. control
Variable -24 (-26 to -23)
p < 0.001
-52 (-54 to -49)
p < 0.001
40 (40 to 41)
p < 0.001
-27 (-29 to -24)
p < 0.001
65 (63 to 66)
p < 0.001
92 (89 to 94)
p < 0.001
Fixed 2 2 17 -0.1 15 15
Total -23 (-24 to -21)
p < 0.001
-50 (-50 to -47)
p < 0.001
57 (57 to 58)
p < 0.001
-27 (-30 to -25)
p < 0.001
80 (79 to 81)
p < 0.001
107 (105 to 109)
p < 0.001
  1. Notes TPC = tailored print communication; TMI = telephone motivational interviewing; combined = combination of TPC and TMI; *Confidence intervals and p values were obtained by bias corrected accelerated bootstrapping with 2000 replications in Stata.