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Table 2 Adjusted baseline to 12 months mean changea in behavioural outcomes with and without behavioural screening

From: The impact of behavioural screening on intervention outcomes in a randomised, controlled multiple behaviour intervention trial

  All participants (unscreened) Participants included with physical activity screening Participants included with diet screening Participants included with physical activity or diet screening
  (n = 431) (n = 324) (n = 394) (n = 299)
Physical activity (minutes/week)    
Telephone Counselling (TC) 71.16 (14.28)*** 113.15 (13.96)*** c 62.03 (15.02)*** 103.27 (14.35)***
   Usual Care (UC) 84.48 (14.92)*** 78.46 (14.71)*** 86.00 (15.65)*** 76.15 (15.14)***
   TC - UC -13.32 (-53.91, 27.26) 34.70 (-5.22, 74.61) Δ -23.96 (-66.60, 18.67) Δ 27.12 (-13.95, 68.19) Δ
Fruit intake (servings/day)     
   TC 0.50 (0.06)*** 0.49 (0.07)*** 0.52 (0.06)*** 0.49 (0.07)***
   UC 0.20 (0.06)** 0.23 (0.07)** 0.23 (0.07)** 0.28 (0.08)**
   TC - UC 0.30 (0.12, 0.47) 0.26 (0.07, 0.46) Δ 0.29 (0.10, 0.47) 0.21 (+0.00, 0.42) Δ
Vegetable intake (servings/day)    
   TC 1.05 (0.24)*** 0.95 (0.26)*** 1.21 (0.23)*** 1.13 (0.24)***
   UC 0.34 (0.25) 0.25 (0.26) 0.53 (0.23) 0.43 (0.25)
   TC - UC 0.71 (0.03, 1.39) 0.70 (-0.03, 1.39) 0.68 (0.04, 1.32) 0.70 (0.02, 1.39)
  (n = 426)b (n = 320)b (n = 389)b (n = 295)b
Total fat intake (% calories)     
   TC -1.98 (0.25)*** -1.95 (0.35)*** -2.06 (0.30)*** -1.99 (0.34) ***
   UC -0.83 (0.31)** -1.01 (0.36)** -0.93 (0.31)** -1.12 (0.36)**
   TC - UC -1.15 (-1.98, -0.32) -0.94 (-1.93, 0.05) Δ -1.13 (-1.98, -0.28) -0.87 (-1.84, 0.11) Δ
Saturated fat intake (% calories)     
   TC -1.57 (0.25)*** -1.60 (0.27)*** -1.59 (0.26)*** -1.65 (0.28)***
   UC -0.60 (0.26)* -0.66 (0.27)* -0.63 (0.27)* -0.70 (0.29)*
   TC - UC -0.97 (-1.68, -0.26) -0.94 (-1.69, -0.19) -0.97 (-1.71, -0.23) -0.95 (-1.74, -0.16)
Fibre intake (g/day)     
   TC 1.83 (0.46)*** 1.52 (0.57)* 2.06 (0.48)*** 1.74 (0.57)**
   UC -0.40 (0.48) -0.63 (0.59) 0.19 (0.50) -0.02 (0.60)
   TC - UC 2.23 (0.93, 3.53) 2.15 (0.54, 3.77) 1.87 (0.50, 3.24) Δ 1.76 (0.12, 3.40) Δ
  1. a Adjusted means (standard error or 95% CI) of change from baseline to 12-months (adjusted for baseline values), with random intercepts for practice and subject.
  2. b Sample size differs due to the exclusion of participants with invalid data from the food frequency questionnaire.
  3. c Bold cells represent behaviours predicted to be impacted by screening
  4. Δ Substantial change (≥10%) in intervention effects when behavioural screening is employed compared to when it is not.
  5. * p < 0.05 (for change from baseline)
  6. ** p < 0.01
  7. *** p < 0.001
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