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Table 6 Summary of characteristics and results at 6 and 12 months for the included pre post 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**

Pre mean

Post mean

Mean difference

Within-group significance

Absetz 2007 [19]

Location: Finland Setting: PHC

% dropout: 9.4

12

Wt Male Female

100.0 (18.1) 86.0 (13.2)

98.5 (18.1) 85.5 (13.3)

NR

p < 0.01 NS

Risk factor: T2DM

Sex: 265 women, 87 men

Comparison: Before and after

Age, mean (SD): 58 (4.3) women, 59 (3.7) men

BMI Male Female

32.0 (5.3) 32.5 (4.6)

31.5 (5.2) 32.3 (4.7)

NR

p < 0.01 NS

Arrebola 2011 [20]

Location: Spain Setting: PHC

% dropout: 55

6

Wt

86.0 (15.6)

79.2 (13.4)

NR

p < 0.001

Risk factor: Nil

BMI

32.0 (2.9)

29.4 (2.9)

NR

p < 0.001

Sex: 43 women, 17 men

Comparison: Before and after

Age, mean (SD): 40 (9)

Gilis-Januszewska 2011 [24]

Location: Poland Setting: PHC

% dropout: 0

12

Wt

85.6 (16.1)

83.7 (15.9)

1.9 (5.0)

p < 0.05

Risk factor: T2DM

Sex: 137 women, 38 men

Comparison: Before and after

Age: NR

BMI

31.7 (5.0)

31.0 (4.9)

0.6 (1.9)

p < 0.05

Laatikainen 2007 [27]

Location: Australia Setting: PHC

% dropout: 23.8

12

Wt

91.7 (17.7)

NR

−2.5 (95% CI −3.19, −1.85)

p < 0.05

Risk factor: T2DM

Sex: 172 women, 65 men

Comparison: Before and after

Age, mean (SD): 56.7 (8.7)

BMI

33.5 (5.9)

NR

−0.9 (95% CI −1.17, −0.69)

p < 0.05

  1. Wt: Weight.
  2. BMI: Body mass index.
  3. *kg.
  4. **kg/m2.
  5. Mean (SD) unless specified otherwise.