From the late 1960s on the hospital followed the national trend toward "open door" policies.

The state's experience has run counter to a national trend, however, he said.

As usual, California is at the center of a national trend.

State health officials said the new law, which passed easily earlier this year, was following a national trend.

Believe it or not, this is part of a national trend.

The studies of national trends that do exist look only at high school students.

Now, she said, a single teacher works part time, a situation that reflects a national trend.

The problem may be part of a national trend, they said.

"But the second point is that we have stopped the national trend."

Drug use among American high school students, college, and other young adults: national trends through 1986.