Group disability insurers protected about 42 million U.S. workers against long-term disability during the first half of the year, 6% more than they protected during the first half of 2007.

The number of U.S. workers protected by group short-term disability policies also increased 5%, to about 17 million.

JHA, Portland, Maine, published those figures in a summary of results from a survey of 30 major U.S. disability insurers.

JHA, a disability risk management and consulting unit of General Re Life Corp., found that premium revenue from new sales was down 5% for group LTD coverage and down 3% for group STD coverage.

New sales revenue from LTD coverage totaled $869 million, and new sales revenue from STD coverage amounted to $394 million.

Premium revenue from in-force cases rose 6% for LTD coverage, to $4.9 billion, and 5% for STD coverage, to $1.7 billion.

Average premium revenue per employee insured through a new sale fell 6% in the group LTD market, to $212, but increased 1% in the group STD market, to $193, according to JHA.

JHA also has released results from its first mid-year group life market survey.

Participating companies generated $1.3 billion in new annualized group term life sales premium revenue, and $8 billion in premium revenue from group term life programs already in place.

Group life cases already in force had an average of 164 lives, and new group life cases had an average 157 lives.