Michael McDonnell
Analyst · Eric Coldwell from Robert W. Baird
Thank you, Tom, and good morning, everyone.
Let's begin with the consolidated results on Slide 4. For the quarter ended March 31, 2016, consolidated service revenues grew 8.4% at constant currency compared to the prior year quarter. At actual foreign exchange rates, service revenues grew 7.6% to $1.11 billion in the quarter, net of an unfavorable foreign exchange impact of $8.1 million. For the quarter, the North America and Latin America region contributed approximately 45% of our consolidated revenues. The Europe, Middle East and Africa region contributed nearly 33% and the Asia Pacific region contributed approximately 22% of total consolidated revenues.
The Product Development segment accounted for 75.6% of our service revenues, while the IHS segment accounted for 24.4%, a 280 basis point greater contribution from Product Development compared to the first quarter of 2015 due to stronger revenue growth in this segment, including the revenue from the businesses contributed by Quest Diagnostics into Q² Solutions.
During the first quarter, adjusted income from operations grew 22.5% to $181.9 million, a margin of 16.4% with 200 basis points of margin expansion. This expansion was comprised of 60 basis points due to revenue mix shift as a result of faster revenue growth in Product Development and further leverage of our cost structure, with the remainder resulting from favorable currency fluctuations.
For the first quarter, SG&A was $225.5 million, or 20.4% of service revenues compared to $219.6 million, or 21.3% of service revenues in the prior year. The current year quarter included the increased cost from Q² Solutions, and increase compensation-related costs, partially offset by a positive impact from foreign exchange.
We recognized $4.5 million of other expense, net, in the first quarter compared to $2.9 million of other income net during the same period last year.
In the first quarter of 2016, this primarily consisted of $4.2 million of foreign currency net losses. We recognized $3.1 million in net restructuring charges during the first quarter in connection with previously approved and announced plans. Net income attributable to noncontrolling interests was $2.4 million in the first quarter, primarily due to the 40% minority interest in Q² Solutions.
Income tax expense was $42.6 million during the quarter, equating to a GAAP effective income tax rate of 28.6% compared to $36.1 million and 29.7%, respectively, for the same period last year.
Adjusted net income in the first quarter grew 18.7% to $108.3 million compared to the same period last year. Diluted adjusted earnings per share grew 23.6% to $0.89 per share in the first quarter compared to $0.72 per share in the prior year quarter.
Our cash balance was $1.05 billion as of March 31, 2016, of which $228 million was in the U.S. Cash flow from operations and free cash flow were $112 million and $86 million, respectively, for the quarter ended March 31, 2016. The net cash provided by operations during the period reflects the increase in net income as well as lower payments for interest and income taxes, and a 1-day improvement in days sales outstanding in the first 3 months of 2016.
Capital expenditures were $26.2 million for the quarter or 2.4% of service revenues compared to $16.4 million during the same period in 2015.
Our total debt outstanding as of March 31, 2016, was $2.46 billion. Our net debt outstanding, defined as total debt and capital lease obligations less cash and equivalents, at March 31, 2016, was $1.4 billion compared to $1.49 billion at the end of December 2015. This decrease is primarily due to the higher cash balance.
The $1.03 billion of new business booked during the quarter, net of foreign exchange impact on the backlog, resulted in backlog of $12 billion. Let's now move to the 2 reporting segments, beginning on Slide 5.
In Product Development, we booked net new business totaling $799 million, representing a book-to-bill ratio of 0.95x service revenues in the quarter.
Product Development's constant currency revenue grew 12.6% in the first quarter compared to the same period last year, and at actual foreign exchange rates, grew 11.7% to $837.5 million, including $6.9 million of unfavorable foreign exchange impact. Product Development's constant currency revenue growth benefited from volume-related increases in core clinical services and clinical trials support services as well as the incremental impact of the business that Quest contributed to Q² Solutions.
Product Development income from operations for the quarter was $189.3 million, a 20.6% increase at actual rates and 12.1% increase at constant currency rates. The Product Development income from operations margin was 22.6% in the quarter, an improvement of 170 basis points compared to the same period last year. This margin improvement included 180 basis points of foreign exchange benefits offset by an increase in compensation and related expenses as well as our continued investment in the growth of our Global Delivery Network, including the opening of a new facility in Mumbai, India. We continue to -- we intend to continue investing in growth through the second quarter, adding and training people both in Mumbai and our clinical development organization as a whole.
In the IHS segment, we booked net new business of $227 million, representing a book-to-bill ratio of 0.84x service revenues in the first quarter. IHS service revenues declined 3.1% at constant currency rates in the first quarter. At actual foreign exchange rates, service revenues were $270.5 million, representing a decrease of 3.5% or $10 million compared to the same period last year, including unfavorable foreign exchange of $1.2 million. As expected, IHS constant currency revenue growth started the year slowly as a result of cancellations in commercial services during 2015 as well as lower new business additions in Japan. This constant currency service revenue decrease was offset by growth in the real-world and late phase research unit.
IHS income from operations for the first quarter was $17.9 million, a decrease of 1.1% at actual rates and a 6.5% decrease at constant currency rates. The IHS income from operations margin was 6.6% in the quarter, an improvement of 10 basis points compared to the same period last year. This margin improvement included higher margins in the real-world and late phase unit, and a benefit of 40 basis points from favorable currency fluctuations, offset by lower margins in commercial services in North America and Japan and advisory services.
Now turning to our 2016 full year guidance. Today, we are reaffirming that our 2016 constant currency service revenue growth guidance remains in the range of 7% to 8.5% compared to the full year of 2015. We are also reaffirming our expectations of diluted adjusted earnings per share of between $3.70 and $3.85 per share, representing growth of 11.1% to 15.6% and diluted GAAP earnings per share of between $3.52 to $3.70 per share. We continue to expect the annual effective income tax rate to be approximately 29%.
This financial guidance assumes foreign currency exchange rates as of the end of March remain in effect for the remainder of the year, and does not reflect the potential impact of any future equity repurchases. I will now turn the call back to Tom.