These are the 10 most stressful cities in the world

A new study by Zipjet ranked the world's most stressful cities

1. Baghdad, Iraq

2. Kabul, Afghanistan

3. Lagos, Nigeria

4. Dakar, Senegal

5. Cairo, Egypt

6. Tehran, Iran

7. Dhaka, Bangladesh

8. Karachi, Pakistan

9. New Delhi, India

10. Manila, Philippines

How'd they come with it — and why?

The study used factors like traffic, security, employment, mental health and even the amount of sunshine hours to determine the stress levels of residents of the world’s largest cities. A spokesperson for Zipjet said they undertook the study so more stressful cities can learn from less stressful cities.

Florian Färber, managing director of Zipjet, said in a statement, “Mental health problems are on the rise worldwide, with stress being a trigger and contributing factor toward this increase.

“We hope that by pinpointing how the least stressful cities are managing this issue, those cities struggling with a stressed out population can overcome it,” Färber said. “We’re happy to be a part of the wave of digitalization working to reduce stress all around the world.”

The least stressful cities in the world

1. Stuttgart, Germany

2. Luxembourg City, Luxembourg

3. Hanover, Germany

4. Bern, Switzerland

5. Munich, Germany

6. Bordeaux, France

7. Edinburgh, UK

8. Sydney, Australia

9. Graz, Austria

10. Hamburg, Germany

What about U.S. cities?

In the United States, Seattle is ranked as the 12th least stressful city, Boston is 36th, and San Francisco is ranked 40th.

See the full list of cities here.