Laboratory Corp. of America Holdings’ fourth-quarter earnings fell 11 percent, as restructuring charges and other one-time costs weighed on results for the clinical lab services company.

The Burlington, North Carolina, company earned $120.2 million, or $1.26 per share, in the three months that ended Dec. 31. That compares with net income of $135.4 million, or $1.34 per share, in the final quarter of 2011. Adjusted earnings were $1.54 per share, excluding restructuring charges and amortization expense.