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Reason to quit current job by age. Green: Age < 30 (%). Blue: Age 30-39 (%). Yellow: Age >=40 (%). Note: (1) * means p < 0.05, indicating that the results of χ2 test showed statistical significance; (2) the number near to each reason represent percentage for primary care doctors age under 30 years old, age between 30 and 39 years old and age 40 years old or older respectively
