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
Study | MC Chiro | Work-Up | PARA |
|---|---|---|---|
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 weeks | 1.40 (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) |