Some Things in Life Are So Obviously Correlated
That no formal research is needed to verify their relationship. Time management and stress... even though their relationship has been verified many times and in many ways... are two such elements.
While it's true that stress doesn't necessarily adversely affect your management of time I would bet that your management of time definitely affects your stress level. To prove the point let's consider two scenarios.
Dysfunctional Time Management and Beverly's Stress Level
Beverly leaves her job at 5 pm and heads to her friendly neighborhood grocery store.
On the way there she absent-mindedly flips through her mental recipe book in the vain hope that she's able to "grab and go" when she reaches the store. When she arrives she still hasn't decided so she spends a little time wandering the aisles until she settles on hamburger helper (boy, does she ever feel like she needs helped).

