Table 2 Factor loadings, eigenvalues, variance explained from principal component analysis with Varimax rotation, and Cronbach’s alpha for each factor for the Japanese version of the food frequency questionnaire in Japanese (n = 355)
From: Cross-cultural validity of a dietary questionnaire for studies of dental caries risk in Japanese
Factor loading component | ||||
|---|---|---|---|---|
Ia | IIb | IIIc | IVd | |
Donuts, or muffins | 0.704 | 0.030 | 0.111 | 0.091 |
Pudding or custard | 0.624 | -0.111 | 0.322 | 0.134 |
Bread filled with bean jam or fruit jam | 0.622 | 0.712 | 0.095 | -0.229 |
Bar of sweet jellied adzuki-bean paste | 0.480 | 0.286 | -0.046 | 0.025 |
Rice cake | -0.109 | 0.705 | -0.111 | -0.106 |
Bun with a bean-jam filling | 0.379 | 0.588 | -0.022 | 0.013 |
Popcorn | 0.095 | 0.554 | 0.085 | 0.184 |
Rice cracker | 0.238 | 0.472 | 0.033 | 0.063 |
Chocolate | 0.173 | 0.420 | 0.124 | 0.182 |
Cold drink | 0.075 | 0.019 | 0.696 | 0.129 |
Soda (not diet) | 0.148 | -0.011 | 0.614 | 0.133 |
Ice cream or sorbet | 0.183 | 0.038 | 0.612 | 0.011 |
Hard candy | -0.016 | 0.043 | 0.176 | 0.679 |
Gum (not sugar-free) | 0.083 | -0.026 | 0.221 | 0.648 |
Sugar or honey in coffee or tea | -0.112 | 0.065 | 0.083 | 0.512 |
Sticky candy (caramel) | 0.071 | 0.157 | -0.105 | 0.415 |
Cheese | 0.139 | -0.009 | -0.053 | 0.007 |
Plain yoghurt | -0.052 | 0.078 | -0.094 | 0.037 |
Sugared yoghurt | 0.208 | -0.076 | -0.134 | 0.127 |
Bread | 0.192 | 0.047 | -0.036 | 0.020 |
Rice | -0.050 | 0.039 | 0.006 | -0.039 |
Plain cereal | -0.073 | 0.076 | 0.048 | -0.051 |
Sugared cereal | 0.033 | -0.047 | 0.140 | -0.007 |
Lactic acid drink | 0.004 | 0.103 | 0.042 | 0.071 |
Canned fruit | 0.072 | 0.037 | 0.042 | 0.052 |
Dried fruit | 0.123 | -0.112 | -0.085 | 0.088 |
Banana | 0.165 | -0.113 | -0.213 | -0.012 |
Milk | -0.045 | -0.065 | -0.101 | 0.067 |
Fruit juice | -0.046 | -0.082 | 0.155 | 0.140 |
Cocoa | -0.023 | 0.177 | -0.208 | 0.347 |
Sugar added to cereal | -0.048 | 0.067 | 0.070 | -0.011 |
Jam, jelly or syrup | -0.184 | 0.337 | 0.244 | -0.100 |
Jello (not sugar-free) | 0.180 | -0.018 | 0.326 | -0.081 |
Cookies | 0.341 | 0.269 | -0.026 | 0.140 |
Cakes or pies | 0.382 | 0.235 | 0.158 | 0.171 |
Chips | 0.072 | 0.320 | 0.174 | 0.069 |
Breath mints | 0.155 | 0.071 | -0.069 | 0.347 |
Cough drops | -0.096 | 0.019 | 0.064 | 0.042 |
Eigenvalue | 4.055 | 2.183 | 1.898 | 1.827 |
% variance | 10.671 | 5.745 | 4.996 | 4.807 |
Cronbach’s alpha | 0.61 | 0.58 | 0.56 | 0.46 |