This thread covers it quite extensively :). Basically:
The Digital History project website at the University of Houston, co-authored by Steven Mintz and Sara McNeil, has a brief blurb on cases of starvation in the U.S. during the Great Depression:
President Herbert Hoover declared, "Nobody is actually starving. The hoboes are better fed than they have ever been." But in New York City in 1931, there were 20 known cases of starvation; in 1934, there were 110 deaths caused by hunger. There were so many accounts of people starving in New York that the West African nation of Cameroon sent $3.77 in relief.
Also, I did do a tiny bit of research on the topic. Here's a paper I found on death during the Great Depression (peer-reviewed):
Of six causes of death that compose about two-thirds of total mortality in the 1930s (Fig. 4), only suicides increased during the Great Depression. Suicide mortality peaked with unemployment, in the most recessionary years, 1921, 1932, and 1938.^^1
I was not content with this, because that was the only quote I could find relating in any way to whether starvation was bad/worse in terms of death, so I dug deeper for more articles on the subject. I found very little. As far as I can tell, hunger was a common thing (moreso than before, at least), but death from starvation was not something that happened very often. I can't get any concrete numbers, but that should give you something to work with.
^^1 Life and Death during the Great Depression José A. Tapia Granados, Ana V. Diez Roux and Alejandro Portes Proceedings of the National Academy of Sciences of the United States of America , Vol. 106, No. 41 (Oct. 13, 2009) , pp. 17290-17295
I think a more interesting question to ask might be: what were the rates of malnutrition during the Great Depression and did these translate into higher death rates from infectious diseases due to weakened immune systems (borrowing here from studies of the medieval Bubonic Plague, esp. Brian Fagan's The Little Ice Age: How Climate Made History 1300-1850, New York, 2000). I cannot claim any advanced expertise in American history, but I recall seeing many photographs of ill-fed looking, transient Okies. I'd be curious to know if any similar demographic had death rates higher than the national average of the day.