Retrieve and display data from custom db table in admin area?

Working code for adding widget to wp dashboard with information from custom DB:

/**
 * Add application widget to the dashboard.
 */
function addApplicationWidget() {
    wp_add_dashboard_widget(
                 'submitted_applications',         
                 'Submitted Applications',        
                 'showApplicants' 
        );  
}
add_action( 'wp_dashboard_setup', 'addApplicationWidget' );

function showApplicants() {
    global $wpdb;

    $appTable = $wpdb->prefix . "applications";
    $query = $wpdb->prepare("SELECT * FROM $appTable WHERE %d >= '0'", RID);
    $applications = $wpdb->get_results($query);

    foreach ( $applications as $application ) {
        echo $application->title . " " . $application->app_firstName . " " . $application->app_surName . "<br/>";
    }
}