docs/Fat.md

In wzhou7/Fruved: Score Fruved Instruments

What is NCI Fat?

NCI Fat stands for NCI's Percentage Energy from Fat Screener (NCIFat). It is a 17-item survey instrument developed by NIH's National Cancer Instritute (NCI). A copy of the questionaire can be obtained here (PDF).

Data Preparation

We provide the following utility function in R to rename your variable names. Please note that you still need to ensure that the data encoding is correct for each variable.

data <- NCIFat_Variables(data, UNIQUEID="ID",
                            DSQ_xx1="ageinyr",
                            DSQ_xx2="gender",
                            DSQ_010="cereal",
                            DSQ_020="cereal_type1",
                            DSQ_xx3="cereal_type2",
                            DSQ_030="milk",
                            DSQ_040="soda",
                            DSQ_050="juice",
                            DSQ_060="coffee",
                            DSQ_070="energy_drink",
                            DSQ_080="fruits",
                            DSQ_090="green_veges",
                            DSQ_100="fried_potatoes",
                            DSQ_110="other_potatoes",
                            DSQ_120="beans",
                            DSQ_130="other_veges",
                            DSQ_140="pizza",
                            DSQ_150="salsa",
                            DSQ_160="tomato_sauce",
                            DSQ_190="cheese",
                            DSQ_180="proc_meat",
                            DSQ_200="whole_grain_bread",
                            DSQ_210="whole_grains",
                            DSQ_220="choc_candy",
                            DSQ_230="donut_muffin",
                            DSQ_240="cookie_cake",
                            DSQ_250="icecream",
                            DSQ_260="popcorn")

Once you save the output data frame data in a standard data file (such as CSV), you can import it in SAS, and run the official SAS scoring script.

How to Score Your Data in R?

The scoring algorithms are well documented and a SAS program file is provided on its official website. This package implements the scoring algorithms in R. We followed the scoring logic and variable naming as closely as possible.

Once your data (encapsulated in data frame named data) is cleaned and formatted according to the official codebook, you can run this:

data_scored <- NCIFat_Scores(data)

By default, the output data frame data_scored will only include the UNIQUEID and the computed variables.

Input and Output

NCIFat Input Data Formatting Requirements

Think about your eating habits over the past 12 months. About how often did you eat or drink each of the following foods? Remember breakfast, lunch, dinner, snacks, and eating out. Blacken in only one bubble for each food.

Ncifat1 …Cold cereal 1) Never 2) Less than once per month 3) 1-3 times per month 4) 1-2 times per week 5) 3-4 times per week 6) 5-6 times per week 7) 1 time per day 8) 2 or more times per day Ncifat2 …Skim milk, on cereal or to drink Same as Ncifat1 Ncifat3 …Eggs, fried or scrambled in margarine, butter, or oil Same as Ncifat1 Ncifat4 …Sausage or bacon, regular-fat Same as Ncifat1 Ncifat5 …Margarine or butter on bread, rolls, pancakes Same as Ncifat1 Ncifat6 …Orange juice or grapefruit juice Same as Ncifat1 Ncifat7 …Fruit (not juices) Same as Ncifat1 Ncifat8 …Beef or pork hot dogs, regular-fat Same as Ncifat1 Ncifat9 …Cheese or cheese spread, regular-fat Same as Ncifat1 Ncifat10 …French fries, home fries, or hash brown potatoes Same as Ncifat1 Ncifat11 …Margarine or butter on vegetables, including potatoes Same as Ncifat1 Ncifat12 …Mayonnaise, regular-fat Same as Ncifat1 Ncifat13 …Salad dressings, regular-fat Same as Ncifat1 Ncifat14 …Rice Same as Ncifat1 Ncifat15 …Margarine, butter, or oil on rice or pasta Same as Ncifat1

Ncifat16 Over the past 12 months, when you prepared foods with margarine or ate margarine, how often did you use a reduced-fat margarine? 1) Didn’t use margarine 2) Almost never 3) About ¼ of the time 4) About ½ of the time 5) About ¾ of the time 6) Almost always or always

Ncifat17 Overall, when you think about the foods you ate over the past 12 months, would you say your diet was high, medium, or low in fat? 1) High 2) Medium 3) Low

wzhou7/Fruved documentation built on June 15, 2025, 1:16 a.m.