Epi Info™ User Guide
Using the Nutrition Project
The Nutrition Project is a special data entry form that can be opened in the Enter module. You can type in a child’s age, height, weight, and other measurements for each clinic or doctor’s office visit. As you enter the measurements, the appropriate z-scores and percentiles are automatically calculated and added to the data set. The WHO Child Growth Standards are used to calculate z-scores for children 0 to 2 years of age and the CDC 2000 reference is used to calculate z-scores for children 2 years of age and older. For more information, see www.cdc.gov/growthcarts.
Opening the Nutrition Form
To open the Nutrition project:
- From the Epi Info 7 menu, click the Enter Data button. The Enter module loads.
- From the toolbar, click the Open Form button. The Open Form dialog box appears.
- Click the ellipsis button (…) next to the Current Project text box. A Select a Project dialog box appears. To open a form, you must select an Epi Info 7 project first.
- Navigate to the /Projects subfolder. A list of projects appears as shown in Figure 6.1.
Figure 6.1: The Projects subfolder
- Select the Nutrition folder. Click Open. A list of project files appears.
- Select the Nutrition project file. Click Open. The Open Form dialog reappears with a list of available forms to select.
- From the list of forms, highlight Nutrition.
- Click OK. The Nutrition form appears in the Enter Data window as shown in Figure 6.2.
Figure 6.2: The Nutrition data entry form
Using the Nutrition Form
After the Nutrition Form is displayed (Figure 6.2), data can be entered, modified, and deleted in the same manner as other Epi Info 7 forms. Each record in the Nutrition form represents a single child. The form also contains the optional capability to ‘geocode’ the child’s home address into latitude and longitude coordinates when you press the Get Coordinates button. See the Enter Data chapter to learn more about the data entry process.
Although the data entry form contains only one record per child, each child may have been measured at multiple points in time. Capturing each of the child’s measurements is essential to generate statistics and graphs. The Nutrition form has a “related” form, called PatientVisits, to store measurement information. A child record may have one or more associated visit records. Clicking the Enter Measurement Data button will present you with the PatientVisits form (Figure 6.3).
Figure 6.3: The PatientVisits data entry form
The patient’s name, sex, date of birth, and ID number automatically appear when you open the form. These values link the records in this form to the child’s nutritional record in the Nutrition form. As you type values into the visit form (e.g., date of measurement, age in months, height, weight, etc.) the z-scores and percentiles automatically calculate.
You can add measurement records by clicking the New Record button on the Enter toolbar. Clicking the <- Back button closes the visit information form and returns you to the Nutrition form (Figure 6.2).
You must understand the relationship between these two forms. For each record in the Demographic Information form (Figure 6.2), there may be one or more linked records in the Visit Information form (Figure 6.3). If one is viewing record #1 in the Demographic Information form, clicking the Enter Measurement Data button will take you to all of the measurements associated with that particular child (and no others). For a visual explanation of the relationship, see Figure 6.4. Note that the blue squares represent records in the Demographic Information form, and the red squares represent records in the Visit Information form.
Figure 6.4: The relationship between a child’s base record (blue, top) and
their measurement records (red, bottom).
If you want to see child #1’s measurement information on 1/6/2001, navigate to child #1’s record in the Demographic Information form. Click Enter Measurement Data and navigate to the record that has 1/6/2001 as the date of measurement.
Customizing the Nutrition Forms
The data entry forms (Figures 6.2 and 6.3) can be customized to include or exclude anything that is shown. For example, if the nutritional surveys are being conducted at a school, new fields could be created to capture the child’s teacher and their grade. Or, if geocoding the child’s address into latitude and longitude is not necessary, those fields could be deleted. The form’s title could also be changed from Nutritional Survey to match whatever organization captures this data. Caution should be used when removing fields or changing field names because this may cause the underlying z-score and percentile calculations to no longer work.
For more information on adding, removing, and modifying fields, see the Form Designer chapter.