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Table 1 Participant characteristics at baseline

From: Long-term efficacy of a Web-based computer-tailored nutrition education intervention for adults including cognitive and environmental feedback: a randomized controlled trial

 

Total (N = 1349)

Control (n = 434)

Basic (n = 456)

Plus (n = 459)

OR [95% CI] for group differencesa

Basic vs. control

Plus vs. control

Plus vs. basic

Background characteristics

 

Age (years), mean (SD)

49.05 (10.62)

50.01 (10.40)

48.63 (11.10)

48.54 (10.30)

0.98 [0.97,0.997]*

0.98 [0.97,0.996]*

1.00 [0.99, 1.01]

 

Gender, n (%)

   
  

Male

478 (35.4)

145 (33.4)

165 (36.2)

168 (36.6)

1

1

1

  

Female

871 (64.6)

289 (66.6)

291 (63.8)

291 (63.4)

0.83 [0.61, 1.11]

0.81 [0.60, 1.10]

1.01 [0.75, 1.35]

 

Ethnicity (n = 1348), n (%)

   
  

Western

1,330 (98.7)

425 (98.2)

451 (98.9)

454 (98.9)

1

1

1

  

Non-western

18 (1.3)

8 (1.8)

5 (1.1)

5 (1.1)

0.48 [0.15, 1.52]

0.44 [0.14, 1.38]

0.90 [0.25, 3.20]

 

Educational level, n (%)

   
  

High

616 (45.7)

184 (42.4)

232 (50.9)

200 (43.6)

1

1

1

  

Low/moderate

733 (54.3)

250 (57.6)

224 (49.1)

259 (56.4)

0.78 [0.59, 1.04]

1.001 [0.76, 1.33]

1.29 [0.98, 1.69]

 

Place of residence (i.e. cities in the Netherlands), n (%)

   
  

Heerlen

323 (23.9)

103 (23.7)

113 (24.8)

107 (23.3)

1

1

1

  

Roermond

217 (16.1)

69 (15.9)

78 (17.1)

70 (15.3)

1.04 [0.68, 1.61]

1.00 [0.65, 1.54]

0.97 [0.64, 1.48]

  

Weert

251 (18.6)

77 (17.7)

82 (18.0)

92 (20.0)

1.04 [0.68, 1.58]

1.19 [0.79, 1.81]

1.18 [0.79, 1.78]

  

Venlo

304 (22.5)

104 (24.0)

93 (20.4)

107 (23.3)

0.82 [0.55, 1.22]

1.02 [0.69, 1.50]

1.27 [0.85, 1.88]

  

Venray

254 (18.8)

81 (18.7)

90 (19.7)

83 (18.1)

1.06 [0.70, 1.61]

1.05 [0.69, 1.59]

1.00 [0.67, 1.51]

Primary outcome measures

 

Vegetable intake (grams)

   
  

Mean (SD)

159.12 (69.24)

157.73 (64.54)

162.68 (72.76)

156.91 (69.94)

1.00 [0.999,1.003]

1.00 [0.998,1.003]

1.00 [0.997,1.002]

  

Not complying, n (%)

1014 (75.2)

330 (76.0)

338 (74.1)

346 (75.4)

   
 

Fruit intake (pieces)

   
  

Mean (SD)

1.85 (1.29)

1.80 (1.23)

1.92 (1.36)

1.81 (1.27)

1.11 [0.98, 1.26]

1.06 [0.93, 1.20]

0.94 [0.83, 1.06]

  

Not complying, n (%)

803 (59.5)

261 (60.1)

263 (57.7)

279 (60.8)

   
 

High-energy snack intake (pieces)

   
  

Mean (SD)

3.34 (2.98)

3.19 (2.74)

3.30 (2.94)

3.51 (3.24)

1.04 [0.97, 1.10]

1.05 [0.99, 1.11]

1.02 [0.96, 1.08]

  

Not complying, n (%)

808 (59.9)

251 (57.8)

275 (60.3)

282 (61.4)

   
 

Fat intake (‘Fat-points’) (n = 1348)

   
  

Mean (SD)

17.91 (6.07)

17.99 (6.07)

17.60 (6.09)

18.13 (6.05)

0.97 [0.94, 1.003]

0.98 [0.95, 1.01]

1.01 [0.98, 1.04]

  

Not complying, n (%)

627 (46.5)

197 (45.4)

203 (44.5)

227 (49.5)

   
 

Total number of guidelines complying with, mean (SD)

1.59 (1.12)

1.61 (1.12)

1.63 (1.11)

1.53 (1.12)

0.84 [0.68, 1.03]

0.88 [0.71, 1.07]

1.04 [0.84, 1.28]

Secondary outcome measures (n = 1347)

    
 

Self-regulation, mean (SD)

3.48 (0.79)

3.44 (0.80)

3.55 (0.78)

3.45 (0.78)

1.15 [0.93, 1.43]

0.98 [0.79, 1.22]

0.88 [0.71 1.08]

 

Self-control, mean (SD)

2.96 (0.86)

2.91 (0.88)

3.02 (0.84)

2.96 (0.87)

1.13 [0.91, 1.39]

1.21 [0.98, 1.49]

1.06 [0.86, 1.31]

 

BMI (kg/m 2 )

      
  

Mean (SD)

25.64 (4.20)

25.72 (4.40)

25.43 (4.06)

25.76 (4.14)

1.01 [0.97, 1.04]

1.02 [0.98, 1.05]

1.01 [0.98, 1.05]

  

> = 25 kg/m2, n (%)

682 (50.60)

220 (50.9)

222 (48.7)

240 (52.3)

   
  1. aLogistic regression model with age, gender, ethnicity, educational level, place of residence, fruit intake, vegetable intake, high-energy snack intake, fat intake, number of guidelines complying with, self-regulation, self-control and BMI as independent variables; *Significant at p ≤ .05.
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BMC Public Health

ISSN: 1471-2458

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