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Table 4 Intake of selected food groups (mean (SD) and median) by SFFQ-2007 and SFFQ-1999, mean % difference, within person difference (SD) between the SFFQs and Spearman’s correlation (r) (n = 93)

From: Effect of changes in a food frequency questionnaire: comparing data from two national dietary survey instruments among 12-month-old infants

  SFFQ-2007 SFFQ-1999 Mean % difference Within person difference Spearman’s correlation
Intake (g/day) Mean (SD) Median Mean (SD) Median % SD r
Baby porridge 253.7 (256.8) 204.0 221.0 (171.2) 200.0 14.8 218.5 0.54
Water 257.6 (178.9) 240.0 283.9 (199.5) 300.0 −9.3 241.6 0.48
Commercial baby food 156.2 (144.3) 117.4 179.8 (178.7) 141.2 −13.1 183.4 0.57
Infant formula 135.5 (220.7) 0.0 149.8 (229.7) 0.0 −9.5 221.4 0.46
Milk (to drink) 99.6 (163.6) 17.4 122.9 (200.2) 17.4 −18.9 231.1 0.14
Fruit 87.2 (81.3) 73.7 99.0 (104.3) 70.0 −12.0 86.1 0.64
Bread 72.2 (59.6) 60.0 62.3 (36.6) 60.0 15.9 56.7 0.48
Yoghurt 41.2 (51.0) 25.5 55.6 (71.8) 25.6 −25.8* 71.6 0.47
Vegetables 33.3 (33.4) 25.6 20.1 (22.7) 13.2 65.7** 29.4 0.55
Meat 26.3 (17.5) 24.1 28.7 (20.8) 24.8 −8.2 21.1 0.42
Potato 23.1 (21.3) 18.1 23.1 (27.8) 16.9 −0.3 24.6 0.49
Fruit juices 20.7 (47.1) 0.0 29.6 (89.8) 0.0 −30.0 80.0 0.71
Squash 16.8 (36.0) 0.0 21.4 (57.9) 0.0 −27.8 43.5 0.56
Fish 13.8 (14.4) 10.0 10.3 (12.4) 6.0 34.1** 13.3 0.70
Butter (on bread) 7.5 (8.8) 6.0 7.5 (7.5) 6.0 0.4 8.9 0.51
Cakes 4.0 (5.7) 2.3 3.3 (4.1) 1.8 24.0 4.8 0.62
Cod liver oil 1.1 (1.9) 0.0 1.1 (1.9) 0.0 −3.9 1.3 0.74
  1. Mean % difference between the SFFQs = (mean difference (SFFQ-2007 minus SFFQ-1999)/mean SFFQ-1999)*100.
  2. *P < 0.05, **P < 0.01 (P is based on Wilcoxon’s signed rank test).