Glucose Tolerance Test Standardization Simplified by Urinary Ketone Testing

Effect of Age, Hours since Last Food, Time of Day, and Ketonuria on 1-Hour Glucose Tolerance

“…The 1-hour values of examinees challenged after an overnight fast, however, were much more similar to those of women challenged less than 4 hours after eating than to those obtained from women whose last food had been 4 to 6 hours earlier, regardless of the time of challenge. Thus, these data indicate that a screening test 4 to 6 hours after a meal is not comparable to one administered in a fasting state.…”