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Table 2 Effect of telephone reminder at the 1 year follow-up on health and lifestyle outcomes

From: The impact of non-responders on health and lifestyle outcomes in an intervention study

  Total number = 364   Primary responders (N = 316) Responders after telephone reminding (N = 48) All responders (N = 364)
Intervention (N = 152) Control (N = 164) Intervention (N = 28) Control (N = 20) Intervention (N = 180) Control (N = 184)
Physical health SF12-PCS (Mean score) N = 353 1 year 48.0 48.8 49.9 44.7 48.2 48.3
  Baseline 47.0 47.5 48.6 46.1 47.2 47.3
  Improvement* 01.0 01.3 01.2 -1.4 01.0 01.0
  Difference** (95% CI) -0.3 (-2.4 to 1.7) NS 2.6 (-2.2 to 7.4) NS 0.01 (-1.8 to 1.9) NS
Mental Health SF12-MCS (Mean score) N = 353 1 year 47.0 44.7 46.2 42.8 46.8 44.5
  Baseline 39.8 41.7 38.7 40.1 39.6 41.5
  Improvement* 07.2 03.0 07.6 02.7 07.3 03.0
  Difference** (95% CI) 4.2 (1.3 to 7.0) P = 0.005 4.9 (-2.8 to 12.5) NS 4.3 (1.6 to 6.9) P = 0.002
Mean number of problems (range 0–33) N = 364 1 year 8.3 9.3 8.2 9.9 8.2 9.3
  Baseline 10.2 10.2 9.2 9.6 10.0 10.1
  Improvement* -1.9 -0.9 -1.0 0.3 -1.8 -0.8
  Difference** (95% CI) -1.0 (-1.9 to 0.05) P = 0.04 -1.3 (-40.0 to 1.4) NS -1.0 (-1.8 to -0.2) P = 0.027
Mean self-rated health (range 0–5) N = 355 1 year 2.6 2.5 2.4 3.1 2.6 2.6
  Baseline 2.8 2.6 2.5 2.8 2.8 2.7
  Improvement* -0.2 -0.1 -0.1 0.3 -0.2 -0.1
  Difference** (95% CI) -0.1 (-0.3 to 0.04) NS 0.04 (-0.06 to 0.8) NS -0.15 (-0.3 to 0.008) P = 0.06 NS
Mean weight loss when over weight (BMI > 25 at baseline), kg N = 160 1 year 85.7 87.0 90.6 92.6 86.4 87.6
  Baseline 88.1 88.7 96.7 91.3 89.3 89.0
  Improvement -2.4 -1.7 -6.1 1.3 -2.9 -1.5
  Difference** (95% CI) -0.7 kg (-2.9 to 1.7) NS -7.4 kg (-14.4 to 0.5) NS -1.4 kg (-3.7 to 0.8) NS
Eating more fiber N = 364 1 year 93 (61%) 87 (53%) 18 (64%) 10 (50%) 111 (62%) 97 (53%)
  Difference** 8% (-3 to 18) NS 14% (-13 to 40) NS 8.7% (-1.5 to 19) NS
Doing more exercise N = 364 1 year 55 (36%) 46 (28%) 11 (39%) 6 (30%) 66 (37%0 52 (28%)
  Difference** (95% CI) 8% (-2.1 to 18) NS 9% (-18 to 33) NS 8.4% (-1.2 to 18) NS
Smoked yesterday N = 364 1 year 72 (47%) 91 (56%) 16 (57%) 13 (65%) 88 (48%) 106 (57%)
  Difference** (95% CI) -9% (-20 to 1.7) NS -8% (-33 to 19) NS -8.7% (-18 to 1.5) NS
Smoking less or quit tobacco N = 352 1 year 28 (19%) 26 (16%) 7 (25%) 0 35 (20%) 26 (14%)
  Difference** (95% CI) 3% (-5 to 12) NS 25% (4.7 to 43) 6.4% (-1.8 to 14)
Drinking less or quit alcohol N = 364 1 year 22 (15%) 26 (17%) 9 (32%) 1 (5%) 31 (17%) 27 (15%)
   Difference** (95% CI) -2.6% (-11 to 6) NS 27% (3.7 to 46) 2.5% (-5 to 10) NS
  1. NS, not significant.
  2. *Improvement = 1 year - baseline (in SF12 positive) and improvement in problem is negative (fewer problems).
  3. **Difference is between intervention and control.