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WASHINGTON (CNN) -- Americans appear split over President Barack Obama's health care reform proposals, according to a new national poll.

Fifty percent of those questioned in a CNN/Opinion Research Corporation survey released Wednesday morning say they support the president's plans, with 45% opposed.

The results indicate a generational divide.

"Obama's plan is most popular among younger Americans and least popular among senior citizens," says CNN polling director Keating Holland. "A majority of Americans over the age of 50 oppose Obama's plan; a majority of those under 50 support it."

The poll's release comes as lawmakers go back to their home districts and states for summer recess. The House of Representatives is already on break and the Senate heads home at the end of the week.

Some lawmakers are holding town hall meetings or other public forums on health care reform over the next few weeks, where voters will get a chance to speak out about the various proposals for change. The poll indicates that seven in 10 Americans say they're very or somewhat likely to attend such events.

"Nearly half of those who oppose the Obama plan say they are more likely to attend town hall meetings to express their views on health care; only 37 percent of those who support Obama's plan are very likely to attend a public forum on that issue," adds Holland.

The poll indicates that only three in 10 of all Americans think the president's health care proposals will help their families. Another 44% feel they won't benefit but that other families will be helped by the president's plans, and one in five say no one will be helped.

"Less than a quarter of Americans with private health insurance think that Obama's proposals would help them personally. Most people on Medicare and Medicaid also don't think that the Obama plan will help them," says Holland.

The survey suggests that around seven out of 10 Americans think that major structural changes are necessary to reduce health care costs or provide insurance coverage to all Americans. At the same time, more than eight out of 10 people are satisfied with their own health care and nearly three out of four are happy with their own insurance.

In any health care system, tough decisions that affect individual patients -- such as which people get certain treatments and which treatments are too expensive or ineffective -- must be made. The poll suggests that Americans are split on who they prefer to make such choices, with 40% saying it should be the insurance companies and an equal amount feeling that the government should make the call.

The battle over health care is registering with people across the country. According to the survey, more than half of all Americans have strong feelings regarding the health care debate, with about a third saying they strongly oppose Obama's plans and 23% strongly in favor.

"On issues like this, intensity of opinion matters as much as numbers. Opponents of the president's health care reform seem to feel more intensely about it than Obama's supporters," says CNN senior political analyst Bill Schneider.

The CNN/Opinion Research Corporation poll was conducted Friday through Monday, with 1,136 adult Americans questioned by telephone. The survey's sampling error is plus or minus three percentage points.