Skip to main content

Table 4 Analysis of number of missing SMS (0 thru 8) for the first 8 weeks and the last 8 weeks for the Weekly studies. A Poisson regression model was used and the Relative Risk (RR) is the outcome parameter, and RR = 1.0 indicates no effect, presented also with confidence intervals, and RR > 1.0 indicates higher risk for non-compliance

From: Frequently repeated measurements -our experience of collecting data with SMS

StudyMC ChiroWork-UpPARA
Variables in model
Age > 50 (reference ≤50)4.27 (1.73–10.50)0.92 (0.59–1.42)4.38 (1.94–9.91)
Sex (reference males)0.20 (0.07–0.55)0.59 (0.39–0.90)1.07 (0.73–1.57)
Pain class 6–7 (reference < 6)1.23 (0.52–2.89)1.15 (0.70–1.89)1.27 (0.87–1.88)
Pain class 8–10 (reference < 6)0.39 (0.05–3.05)1.62 (0.96–2.75)1.48 (0.90–2.44)
Study (with all background variables)1.0 (reference)3.41 (2.13–5.44)9.36 (5.81–15.09)
Age > 50 (reference ≤50)0.52 (0.25–1.08)1.17 (0.93–1.47)1.23 (0.76–1.98)
Sex (reference males)1.56 (0.82–2.97)1.68 (1.31–2.16)1.37 (0.97–1.93)
Pain class 6–7 (reference < 6)5.05 (2.38–10.72)0.86 (0.67–1.10)0.94 (0.68–1.30)
Pain class 8–10 (reference < 6)3.28 (1.30–8.28)0.97 (0.72–1.31)1.54 (1.07–2.22)
#Missing first 8 weeks1.40 (0.95–2.07)1.43 (1.37–1.50)1.35 (1.31–1.39)
Study (with all background variables + #missing first 8 weeks)1.0 (reference)5.21 (3.83–7.11)3.99 (2.82–5.65)