Ma et al. BMC Public Health 2012, 12:568 http://www.biomedcentral.com/1471-2458/12/568 Association between L-ICFI and LAZ, WAZ and WLZ at Visit 3 Mean LAZ and WAZ at Visit 3 (18-month-old) increased as scores of the L-ICFI increased and the association was positively significant after adjustment for confounders (beta = 0.151, P = 0.040 and beta = 0.173, P = 0.024, re- spectively). There was a difference of 0.26 in mean LAZ when moving from the low to the high category of the L-ICFI. However, the mean WLZ had no relationship with the L-ICFI values (Table 5). Association of the CS-ICFIs components at each time point with LAZ, WAZ and WLZ at Visit 3 Among the components of the CS-ICFI at Visit 1 (6- month-old), food consistency was the only component significantly associated with child LAZ (beta = 0.171, P = 0.021) and WAZ (beta = 0.192, P = 0.013) at Visit 3 (18-month-old) (Table 6). Among the components of the CS-ICFI at Visit 3, both dietary diversity and food group frequency score were significantly associated with child LAZ (beta = 0.156, P = 0.036 and beta = 0.171, P = 0.021, respectively) at Visit 3. There were 0.47 and 0.29 mean LAZ differ- ences from low to high score category of dietary diver- sity and food group frequency, respectively. Food consistency was significantly associated with WAZ (beta = 0.167, P = 0.029) and WLZ (beta = 0.163, P = 0.034). Infants in high score categories had higher mean WAZ and WLZ, and the differences were 0.57 and 0.58, respectively (Table 7). However, there was no significant association between the components of the CS-ICFI at Visit 2 (12-month- old) and child anthropometric indices at Visit 3. CS-ICFI distribution at different visits The mean and distribution of the original CS-ICFI values according to different visits are shown in Table 8. The change of age and CS-ICFI scoring system which Table 5 Association between L-ICFI and LAZ, WAZ and WLZ at Visit 3 (18-month-old) Variables Score (0 ~ 6) n Mean LAZ a Mean WAZ a Mean WLZ a L-ICFI Low Medium High Beta b Std.Error P value c 0 ~ 2 3 4 ~ 6 43 57 80 0.23 0.35 0.49 0.151 0.051 0.040 0.62 0.47 0.79 0.173 0.047 0.024 0.69 0.41 0.76 0.121 0.050 0.119 aAdjusted for mother’s pre-pregnancy height and weight, birth weight and annual household income. bStandardized partial regression coefficient. cAssociations between L-ICFI and mean LAZ, WAZ and WLZ were tested using a linear regression model. Page 6 of 9 0.58 0.69 0.070 0.064 0.364 0.35 0.60 0.73 0.130 0.100 0.097 0.45 0.66 0.079 0.211 0.323 0.51 0.57 0.67 0.063 0.109 0.422 0.62 0.64 0.037 0.116 0.641 Table 6 Association between the components of CS-ICFI at Visit 1 (6-month-old) and LAZ, WAZ, WLZ at Visit 3 (18-month-old) Mean LAZ a Mean WAZ a Mean WLZ a aAdjusted for birth weight, mother’s pre-pregnancy height and weight, and annual household income. bSamples with scores of 0 and +1 were combined due to the extremely small size of sample with score 0. cStandardized partial regression coefficient. dAssociations between the components of CS-ICFI at Visit 1 and mean LAZ, WAZ and WLZ at Visit 3 were tested using a linear regression model. influenced the original CS-ICFI values resulted in the variation in subjects and methods. The approach with the use of CS-ICFI z scores instead of original CS-ICFI values led to an estimate of the repeatability coefficient (RC) of 0.14 (95% CI: 0.07, 0.31), which was signifi- cantly different from zero (P < 0.05). It indicated that n 92 88 17 88 75 19 161 11 55 114 Variables Score Breastfeeding Food consistency Feeding frequency b Dietary diversity 0 +2 0 +1 +2 0/+1 +2 0 +1 +2 No Yes Beta c Std.Error P value d Low Median High Beta c Std.Error P value d Low High Beta c Std.Error P value d Low Median High Beta c Std.Error P value d Low High Beta c Std.Error P value d Food group frequency b 0/+1 +2 97 83 0.33 0.44 0.063 0.066 0.391 0.20 0.26 0.58 0.171 0.102 0.021 0.36 0.39 0.012 0.217 0.874 0.44 0.20 0.46 0.087 0.111 0.245 0.36 0.41 0.039 0.119 0.604 0.58 0.72 0.087 0.061 0.255 0.35 0.57 0.81 0.192 0.094 0.013 0.49 0.67 0.070 0.201 0.376 0.58 0.52 0.71 0.096 0.103 0.216 0.63 0.67 0.051 0.111 0.515