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Table 5 Summary of characteristics and results at 6 and 12 months for the included non-equivalent groups design trials

From: Primary health care-level interventions targeting health literacy and their effect on weight loss: a systematic review

Study (Year) Participants Interventions Follow-up (months) Weight*/BMI** Intervention group Control group Between-group significance
Pre mean Post mean Mean difference Pre mean Post mean Mean difference
Bjorkelund 1991 [22] Location: Sweden Setting: Community Allocated: (a) 22 (b) 27 (c) 16 6 Wt
a. 88.1 (9.8) NR −3.98 (3.92) 87.3 (9.6) NR −1.77 (3.31) p < 0.05
b. 70.2 (7.7) NR −2.83 (2.46) 70.9 (7.6) NR −0.42 (2.55) p < 0.001
c. 90.6 (9.0) NR −2.87 (3.65) 88.8 (14.8) NR −1.41 (4.79) NS
Risk factor: Nil % dropout (at 6 months): (a) 0 (b) 4 (c) 6 BMI
a. 33.0 (3.0) NR −1.50 (1.60) 33.2 (3.5) NR −0.65 (1.28) p < 0.05
b. 26.4 (1.8) NR −1.03 (0.95) 26.4 (2.5) NR −0.11 (0.96) p < 0.001
c. 33.9 (3.1) NR −1.04 (1.31) 33.4 (3.2) NR −0.51 (1.88) NS
Sex: all women Comparison: Participants vs. non-participants of the intervention program, each in 3 groups: a. BMI ≥ 30 & W/H ratio < 0.82 b. BMI < 30 & W/H ratio ≥ 0.82 c. BMI ≥ 30 & W/H ratio ≥ 0.82
Age, range: 45-64
Rohrer 2008 [29] Location: USA Setting: PHC Allocated: (a) 71 (b) 55 12 Wt$ NR NR −18.8 (15.7) NR NR 0.87 (5.9) p < 0.001
Risk factor: Nil % dropout: (a) 18.4 (b) 18.2
Sex: (a) 50 women, 21 men (b) 38 women, 17 men Comparison: Intensive structured vs. less intensive
Age, mean (SD): (a) 45.3 (11.6) (b) 48.9 (9.4)
  1. Wt: Weight.
  2. BMI: Body mass index.
  3. *kg.
  4. **kg/m2.
  5. Mean (SD).
  6. $Not based on an ITT analysis.