Ron Bruehlman
IQVIA Holdings, Inc., Executive Vice President and Chief Financial Officer at IQVIA
Thanks, Ari, and good morning, everyone. Let's start by reviewing revenue. Fourth quarter revenue of $3.739 billion grew 2.8% on a reported basis and 7% at constant currency. In the quarter, COVID-related revenues were approximately $190 million, which was down about $150 million versus the fourth quarter of 2021. In our base business, that is excluding all COVID-related work from both this year and last, organic growth at constant currency was 10%.
Technology & Analytics Solutions revenue for the fourth quarter was $1.499 billion, up 0.2% reported and 4.7% at constant currency. Excluding all COVID-related work, organic growth at constant currency in TAS was 7%. R&D Solutions' fourth quarter revenue of $2.058 billion was up 5.9% reported and 9.3% at constant currency. Excluding all COVID-related work, organic growth at constant currency in R&DS was 14%. Finally, Contract Sales & Medical Solutions, or CSMS, fourth quarter revenue of $182 million declined 7.1% reported, but grew 2% at constant currency. Excluding all COVID-related work, organic growth at constant currency in CSMS was also 2%.
For the full year, revenue was $14.410 billion, growing at 3.9% on a reported basis and 7.8% at constant current. COVID-related revenues totaled approximately $1 billion for the year. And our base business, again, that's excluding all COVID-related work, organic growth at constant currency was 13%. For the full year, Technology & Analytics Solutions revenue was $5.746 billion, up 3.8% reported and 8.7% at constant currency. Excluding all COVID-related work, organic growth at constant currency in TAS was 10% for the year.
Full year revenue in R&D Solutions was $7.921 billion, growing 4.8% reported and 7.7% at constant currency. Excluding all COVID-related work, organic growth at constant currency in R&DS was 17%. Full year CSMS revenue was $743 million, which was down 5.2% reported, but grew 2.7% at constant currency. Excluding all COVID-related work, organic growth at constant currency in CSMS was 4% for the year.
Now let's move down the P&L. Adjusted EBITDA was $920 million for the fourth quarter, representing growth of 11.1%, while full year adjusted EBITDA was $3.346 billion, which was up 10.7% year over year. Fourth quarter GAAP net income was $227 million and GAAP diluted earnings per share was $1.20. Full year GAAP net income was $1.091 billion or $5.72 of earnings per diluted share. Adjusted net income was $524 million in the fourth quarter and adjusted diluted earnings per share grew 9% to $2.78. For the full year, adjusted net income was $1.937 billion and adjusted diluted earnings per share was $10.16, up 12.5% year over year.
Now as Ari reviewed, R&D Solutions delivered another outstanding quarter of bookings. Our backlog at December 31 stood at a record $27.2 billion, which was up 9.6% year-over-year on a reported basis and 11.6% adjusting for the impact of foreign exchange. Without that impact of foreign exchange, year-over-year backlog would have been about $500 million higher. Full year net new business increased $10.8 billion growing 6.2% year over year on a reported basis. It increased to $10.8 billion, I should say, growing 6.2% year over year on a reported basis, despite the significant amount of COVID bookings we had in 2021 that didn't repeat in 2022.
Reviewing the balance sheet. As of December 31, cash and cash equivalents totaled $1.216 billion, and gross debt was $12.747 billion, and that resulted in a net debt of $11.531 billion. Our net leverage ratio ended the year at 3.45 times trailing 12-month adjusted EBITDA. Fourth quarter cash flow from operations was $560 million and capex was $171 million, which resulted in free cash flow of $389 million for the quarter.
Now as we shared on the last earnings call, early in the fourth quarter we retired $510 million of variable rate U.S. dollar term loan that was scheduled to mature in early 2024. At the end of the year, we entered into a $1 billion of floating to fixed interest rate swaps to further limit our exposure to changes in interest rates. And with these changes, our debt structure at year end was 66% fixed, and we expect this to drop to about 58% fixed at the end of Q1 when, as you know, we have a $1 billion swap expiring.
December 31 marked the end of our Vision 2022 three-year plan and, as Ari mentioned, we exceeded our commitments and here are a few highlights. We achieved a compound average growth rate to revenue of 9.1% reported and 10.2% adjusted for the impact of foreign exchange. This achievement exceeded the high end of our goal range of 7% to 10%. Our three-year CAGR for adjusted EBITDA was 11.7%, exceeding our goal of 8% to 11%. And for adjusted diluted earnings per share, the average growth rate was 16.7%, consistent with our goal of double-digit growth. Finally, our net leverage ratio exiting 2022 of 3.4 times trailing 12-month adjusted EBITDA compared favorably to our goal of 3.4 to 4 times.
Okay. Let's turn now to 2023 guidance. For the full year 2023, we expect total revenue to be between $15.150 billion and $15.400 billion, representing year-over-year growth of 5.1% to 6.9%. This revenue growth includes about 100 basis points contribution from M&A activity and a very slight FX tailwind of approximately 10 basis points versus the prior year. Adjusting for the COVID-related work stepdown, which we anticipate to be approximately $600 million, the contribution of acquisitions and the FX tailwind, our guidance implies 9% to 11% underlying organic revenue growth at constant currency.
Our adjusted EBITDA guidance is $3.625 billion to $3.695 billion, a growth of 8.3% to 10.4%. Our adjusted dilutive EPS guidance is $10.26 to $10.56, representing year-over-year growth of 1% to 3.9%. Our EPS guidance includes about $615 million of interest expense, just under $550 million of operational D&A, an effective income tax rate of approximately 21%, which is about 1 point higher than it otherwise would have been because of the increase in the U.K. corporate tax rate from 19% to 25%. And finally, our EPS guidance assumes an average diluted share count slightly above 190 million shares.
Adjusting for the year-over-year impact of the onetime step up in interest rates and the higher U.K. tax rate, our guidance implies adjusted EPS growth of 11% to 14%. This guidance assumes about $2 billion of cash deployment split evenly between acquisitions and debt retirement. And regarding the latter, we expect to retire remaining term debt maturing in March 2024 towards the end of the year, that is the end of '23. Based on these assumptions and our guidance, our net leverage ratio should drop to below 3 times adjusted EBITDA by the end of 2023. Finally, our guidance assumes that foreign currency rates, as of February 8th, continue for the balance of the year.
Now I know there are a lot of moving pieces in our guidance, so let me share some additional color on the revenue and adjusted EPS dynamics in 2023. As I mentioned earlier, we anticipate that COVID-related revenue will step down by approximately $600 million versus 2022. And I should highlight that about 40% of this stepdown will occur in the first quarter. Now, we'll more than compensate for this headwind during the course of the year as we project revenue to grow between 9% and 11% organically at constant currency, excluding COVID-related work. As I also mentioned previously, our full year guidance includes about 100 basis points of M&A contribution and a very slight tailwind from foreign exchange of 10 basis points. Now that said, it's important to point out that we'll actually experience a headwind from FX in the first half.
Now at the segment level, we expect TAS revenue growth to be 6% to 8% reported. This includes a year-over-year stepdown in COVID-related work, underlying organic growth for TAS, that is adjusting for the step down in COVID work, FX, and acquisition impacts will be 7% to 9%. R&DS revenue will grow 5% to 7% reported. This reflects an even more significant year-over-year stepdown in COVID-related work, underlying organic growth for R&DS, again, adjusting for COVID-related work, FX, and acquisition impacts, will be 10% to 12%. And finally, in CSMS revenue growth is expected to be flat reported and approximately 2 percentage points organic, excluding COVID-related work and FX impacts.
On adjusted EPS, we will experience the year-over-year impact of the step up in interest rates and an increase in the U.K. corporate tax rate that I mentioned. Together these nonoperational items are expected to impact growth by approximately 10 percentage points year over year. Excluding these items, we expect to deliver strong results with 11% to 14% adjusted EPS growth. It's important to note that the year-over-year increase in interest expense step-up will be most pronounced in the first half, while the operational tailwind from our cost-cutting and productivity initiatives will be skewed towards the second half of the year, and these timing issues are relevant to our first quarter guidance.
The first quarter will be the toughest comparison versus the prior year, primarily due to four factors: Number one, the largest headwind from FX, despite FX being a tailwind for the year; number two, the largest year-over-year COVID-related stepdown; third, the toughest interest expense comparison; and finally fourth, the phase in during the year of the benefits of our productivity initiatives which will increase as we progress through the year.
So as a result in Q1, we expect revenues to be between $3.570 billion and $3.640 billion, a growth of 2.4% to 4.3% on a constant currency basis and 0.1% to 2% on a reported basis. Excluding COVID-related work, we expect organic revenue growth at constant currency to be between 9% and 11%. Adjusted EBITDA is expected to be between $835 million and $860 million, which is up 2.8% to 5.9%. And finally, adjusted diluted EPS is expected to be between $2.35 and $2.46, declining 4.9% to 0.4%. Excluding the step up of interest expense and the tax rate in the U.K., we expect adjusted diluted EPS to grow between 6 and 10% in the first quarter. Again, our guidance assumes that foreign currency rates as of February 8th continue for the balance of the year.
So to summarize, Q4 was another strong quarter capping a successful year. The full year revenue grew 13% organic at constant currency, excluding COVID-related work. And adjusted EPS was up 13%. Underlying demand in the industry and our business remain healthy with RFP growth accelerating in Q4 and record bookings in R&DS. During 2022, we repurchased almost $1.2 billion of our shares and retired $500 million of a variable rate term debt while reducing our net debt leverage ratio to 3.4 times. We exceeded our Vision 2022 commitments despite the volatile macroenvironment. And lastly, we're projecting strong operating performance again in 2023 with 9% to 11% organic revenue growth at constant currency, excluding COVID-related work, and 11% to 14% adjusted EPS growth, excluding nonoperational headwinds.
And with that, let me hand it back over to the operator for Q&A.