ALLERGY, RESPIRATORY
Air Quality Better in Northeast, Midwest
Air Pollution May Raise Blood Pressure
Overweight Moms More Likely to Have Asthmatic Kids
ALTERNATIVE MEDICINE
Pharoah's Wine Jar Yields Medicinal Secrets
Cranberries May Help Prevent Urinary Tract Infections
Indigo Ointment Benefits Psoriasis Patients
ANIMAL CARE
Safe Toys for Dogs
Animals Respond to Acupuncture's Healing Touch
'Comfort Dogs' Come to Emotional Rescue
BONES & JOINTS
Studies Struggle to Gauge Glucosamine's Worth
Health Tip: Back Pain in Children
Exercise Key Player in Knee Replacement Recovery
CANCER
Meditation May Reduce Stress in Breast Cancer Patients
More Americans Urged to Get Cancer Screenings
Mineral May Reduce High-Risk Bladder Disease
CAREGIVING
UV Lights, Fans May Curb TB Spread in Hospitals
Falls Are Top Cause of Injury, Death Among Elderly
Organ Donation Policies Vary Among Children's Hospitals
CIRCULATORY SYSTEM
Firefighters Have Narrower-Than-Normal Arteries, Study Finds
Drink a Little Wine, Live a Little Longer
Walk 100 Steps a Minute for 'Moderate' Exercise
COSMETIC
Wrinkle Fillers Need Better Label Warnings: FDA Panel
The Acne Drug Accutane More Than Doubles Depression Risk
Health Tip: After Liposuction
DENTAL, ORAL
Good Oral Hygiene May Protect Against Heart Infections
Holistic Dentistry-My View
Scientists Find Gene for Tooth Enamel
DIABETES
Strict Blood Sugar Lowering Won't Ease Diabetes Heart Risk
Drug May Not Help Diabetes-Related Eye Damage
Fish Twice a Week Cuts Diabetics' Kidney Risks
DIET, NUTRITION
Successful Weight Loss Shows Unique Brain Patterns
Red Meat No No No But Oily Fish Yes Yes Yes
Leafy Greens Top Risky Food List
DISABILITIES
Review Finds Marijuana May Help MS Patients
Could Your Cell Phone Help Shield You From Alzheimer's?
ENVIRONMENTAL HEALTH
Artificial Light Linked to Prostate Cancer Risk
Researchers ID Genetic Markers for Esophageal Cancer
Skin Woes Take Toll on U.S. Combat Troops
EYE CARE, VISION
When Gauging Age, the Eyes Have It
'Blind' Man Navigates Obstacle Course Without Error
Eye Care Checkups Tied to Insurance Status
FITNESS
FDA Mandates New Warnings for Botox
Be Healthy, Spend Less
Good Warm-Ups Could Halve Sports Injuries
GASTROINTESTINAL PROBLEMS
Traditional Nonsurgical GERD Treatments Not Impressive
Japanese Herbals May Ease Gastro Woes
Gum Chewing May Speed Colon Surgery Recovery
GENERAL HEALTH
Eating Well And Keeping Active As You Grow Old Will Help You Stay Sharp
Living With Less TV, More Sweat Boosts Weight Loss
Food and Water Supply Poisoned by Perchlorate
HEAD & NECK
Many Children Will Outgrow Headaches
Zen May Thicken Brain, Thwart Pain
Ski Helmets Encouraged for All
HEALTH & TECHNOLOGY
Airport Full Body Scanners Pose No Health Threat: Experts
E-Mailing Your Way to Healthier Habits
Using Light Therapy to Silence Harmful Brain Activity
HEARING
Noise Hurts Men's Hearing More, Study Shows
Summer Sounds Can Lead to Hearing Loss
HEART & CARDIOVASCULAR
Brown Rice Tied to Better Heart Health in Study
Polyunsaturated Fats Really May Lower Heart Risk
Quitting Smoking Doubles Survival in Early Stage Lung Cancer
INFECTIOUS DISEASE
Swine Flu Loves a Crowd
Grapefruit Compound Inhibits Hepatitis C Virus
The HPV Vaccine: Preventative Medicine or Human Sacrifice?
INFERTILITY
Obesity May Affect Fertility in Young Womene
KID'S HEALTH
Combo Treatment Eases Wheezing in Babies
Folic Acid Reduces Infant Heart Defects
Working Intensely Early on May Help Autistic Kids
MEN'S HEALTH
Could Chinese Herb Be a Natural Viagra?
Vigorous Exercise Cuts Stroke Risk for Men, Not Women
Soy Linked to Low Sperm Count
MENTAL HEALTH
Shop 'Til You Drop: You May Feel Better
Bullying Seems to Affect Kids Years Later
Living Alone Increases Odds of Developing Dementia
PAIN
'Cell Phone Elbow' -- A New Ill for the Wired Age
Are We Exercising Pain Away? Not So Much.
Acupuncture, Real or Fake, Eases Back Pain
PHYSICAL THERAPY
PREGNANCY
Music of Mozart Soothes the Preemie Baby
Before Conceiving, Take Folic Acid for One Full Year
Expectant Mom's Exercise Keeps Newborn's Birth Weight Down
SENIORS
Memory Loss Help from Brain Supplement Prevagen
The Healthy Habits of Centenarians
Exercise Benefits Even the Oldest Old
SEXUAL HEALTH
SLEEP DISORDERS
Meditation May Help Put Primary Insomnia to Bed
Daylight Savings: Not a Bright Time for All
Sleeping Could Help Women Lose The Baby Fat
WOMEN'S HEALTH
Sleeping Could Help Women Lose The Baby Fat
Iodine in Prenatal Vitamins Varies Widely
Most Women With Osteoporosis Unaware of Raised Fracture Risk
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Weight Loss Might Not Curb Knee Arthritis

FRIDAY, March 13 (HealthDay News) -- Losing weight may not help prevent the progression of knee osteoarthritis, a new study suggests.

Researchers looked at more than 2,600 people with the knee ailment who were at high risk for the condition because they were overweight or obese or had other risk factors such as knee pain or previous knee injuries. Participants were given a physical examination and hip bone mineral test and had X-rays taken of both legs at the start of the study and of their knees again after 30 months.

The study found that obesity did increase the risk of knee osteoarthritis but that weight had no overall effect on the likelihood of the disease progressing, said D.T. Felson, of Boston University School of Medicine, and colleagues.

However, the researchers did find that weight had an effect on progression depending on how the knees were aligned. People with high body mass index and neutral alignment had an increased risk of progressive knee osteoarthritis, those with valgus (knock-kneed) alignment had a small risk and people with varus (bowlegged) alignment had no increased risk.

Among participants who did not have knee osteoarthritis, obesity increased the risk of developing the disease, regardless of their knee alignment.

"The failure to demonstrate that obesity increases the overall risk of [osteoarthritis] progression in our study and others does not eliminate opportunities for weight loss trials aimed at slowing disease progression, especially among knees in extremities with neutral or valgus alignment," the researchers wrote.

The study was published in the March issue of the journal Arthritis Care & Research.

More information

The American Academy of Family Physicians has more about knee osteoarthritis.



-- Robert Preidt



SOURCE: Wiley-Blackwell, news release, March 3, 2009

Last Updated: March 13, 2009

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