Does your doctor smoke? Does she complain about not having time to exercise? Have you spotted a stash of candy bars in her desk drawer? Most off-putting, does she trot out that old "Do as I say, not as I do"? It's a little harder to take physicians' advice seriously if they're not exactly role models themselves. But patients of most doctors at Harvard Medical School can't use that as an excuse, if a new survey of the faculty can be trusted.

The monthly Harvard Health Letter, a consumer newsletter published by the medical school, asked all 15,000-plus faculty members about their health habits and got responses from more than 2,100, enough to paint an intriguing if not quite statistically persuasive portrait. How does your behavior stack up against theirs? Here are some of the key results, published in the lastest issue of the newsletter. You might want to print them out and compare them with your behavior—and hand a copy to your doctor and see how she reacts.

Diet

Eat breakfast—82 percent

Eat fruit and vegetables—

• 7 or more servings a day: 3 percent
• 5 or 6 servings: 9 percent
• 4 or 5 servings: 16 percent
• 3 or 4 servings: 49 percent
• 2 or fewer servings: 23 percent

Eat fast food—

• Never: 29 percent
• Rarely: 59 percent
• 1 to 2 times a week: 10 percent
• Several times a week: 2 percent

Eat at least two servings of fish a week—46 percent

Alcohol

Drinks per week—

• None: 29 percent
• 1 to 5: 51 percent
• 6 to 10: 16 percent
• More than 10: 4 percent

Weight

Healthy body mass index (18.5–25)—65 percent. (BMI is a measure of weight relative to height. You can calculate your BMI by going to www.cdc.gov)

Smoking

Currently smoke—2 percent

Ever smoked—24 percent

Exercise

How many times per week—

• More than 6: 12 percent
• 3 to 5: 46 percent
• 1 to 2: 27 percent
• Less than 1: 15 percent

Sleep

Hours per night—

• 8 or more: 19 percent
• 6 to 7: 68 percent
• Less than 6: 13 percent

Prevention

Physical exam in past year—61 percent

Had colonoscopy screening for colorectal cancer—75 percent (ages 50 and older)

Annual mammogram—67 percent (women ages 40 and older)

Breast self-exam—More than twice a year: 50 percent

Never or rarely: 27 percent

Annual PSA test for prostate cancer—42 percent (men ages 50 and older)

Daily aspirin for heart disease—83 percent (men ages 50 and older at elevated risk)

Take statin drug to lower LDL cholesterol—69 percent (ages 50 and older)

Take supplemental calcium—49 percent (women)

Take multivitamin—78 percent

Always get annual flu shot—55 percent

Alternative medicine

Used a chiropractor—13 percent

Had acupuncture—12 percent

Took herbal supplement—28 percent