After 26 years of marriage to someone with Type 1 diabetes, Roberta Rabinek has grown to learn when her husband, George, is having a hypoglycemic attack, even if he can’t tell it’s happening.

“He’ll tell me he’s fine and to leave him alone,” says Rabinek, who lives in Baltimore. “But he will be a little off…repeats himself a lot and is less responsive. That’s when I know, even if he doesn’t, and make him test his blood sugar. 9 times out of 10 I’m right.”