Douglas Coltharp
Analyst · Barclays Capital
Thank you, Jay, and good morning, everyone. As Jay mentioned, Q1 represented a very solid start to 2012. Revenue grew by 6.4%, driven by inpatient revenue growth of 8.3%, offset by a 13.4% decline in outpatient and other revenue. Revenue growth in the quarter did benefit from the additional day attributable to leap year. The growth in inpatient revenue resulted from a 6% rise in discharge volume, 5% on a same-store basis and a 2.2% increase in revenue per discharge.
The discharge volume growth for the quarter was particularly encouraging in the context of a difficult 7.8% comp from Q1 of 2011. The factors contributing to the increase in net revenue per discharge were similar to those cited last quarter and included the 1.6% increase in our Medicare reimbursement rates, an increase in average acuity, stroke and neurological comprised 35.9% of our patient mix in Q1 2012 versus 33.8% in Q1 2011, and a shift in our payor mix, 73.5% Medicare in Q1 of 2012 as compared to 71.5% in Q1 2011.
The $5.9 million decline in outpatient and other revenue was primarily attributable to the $3.4 million in nonrecurring state provider tax revenue in Q1 2011, with the residual resulting from the year-over-year decline in a number of satellite clinics. We ended Q1 2012 with 26 outpatient satellites in operation, 6 less than Q1 2011. There were no closures during the quarter. As a reminder, we continue to offer outpatient services at all of our hospitals and the vast majority of our outpatient revenue is generated from these hospital-based outpatient departments.
I want to point out that in Q1 2012, we adopted new accounting guidelines which require the presentation of revenues net of the provision of doubtful accounts. This is an income statement geography issue only and simply moves the provision line up from a component of operating expenses. The adoption of this accounting guideline had no net impact on our financial position, results of operations or cash flows, and it did not change our accounting policies or methodologies for determining our revenues or provision for doubtful accounts.
As anticipated, bad debt expense increased to 1.2% of net operating revenues in Q1 2012 as compared to 0.9% in Q1 2011. The factors leading to the increase were those identified in last quarter's call, an increase in medical necessity claims reviews and the lengthening of the Medicare denials adjudication process related to a mounting administrative backlog. We continue to anticipate a $6 million increase in bad debt expense for the full-year 2012 over 2011.
During Q1, we had then generated improved operating leverage and labor productivity in spite of the ramp-up costs associated with our 2 new hospitals and the incurrence of $1.6 million in incremental expenses related to the installation of our new clinical information system.
SWB for the quarter was 48.5% of net operating revenue, an increase of 30 basis points from Q1 2011. Excluding the benefit of $3.4 million in nonrecurring state provider tax revenue in Q1 2011, SWB, as a percentage of net operating revenue, would have been flat year-over-year as increased labor productivity in Q1 2012, evidenced by a decline in EPOB to 3.34 from 3.39 a year ago, was offset by a ramp-up of operations to 2 new hospitals, a continued investment in higher skills mix, including additional certified rehabilitation registered nurses or CRRNs and support personnel for our case managers resulting from our TeamWorks initiative. It also included the annual merit increase for our nonexecutive employees.
We generated improved operating leverage within hospital-related expenses, which is comprised of other operating, supplies and occupancy expenses. That declined to 20.8% of net operating revenues in Q1 2012 as compared to 21.4% in Q1 2011. We also achieved leverage in G&A, which excludes stock-based compensation, which declined by 10 basis points to 4.4% of net operating revenues in Q1 2012.
The combination of strong revenue growth and improved operating leverage generated adjusted EBITDA of $127 million for Q1 2012, an 8.1% increase over Q1 2011. We were able to overcome the higher bad debt expense, the increase in installation costs for our clinical information system and the $1.5 million net benefit from nonrecurring state provider tax revenue in Q1 2011. Interest expense for Q1 2012 was $23.3 million, down from $35.1 million in Q1 2011, with the decrease attributable to the year-over-year decline in total debt and the other improvements we have made to our capital structure.
During the quarter, we repurchased 25,000 shares of our convertible preferred stock requiring a cash outlay of approximately $25 million. The repurchase of these shares will reduce our annual dividend obligation by $1.6 million and our diluted share count by approximately 800,000 shares.
Our leverage ratio at the end of the quarter was 2.7x, unchanged from year-end 2011. With the expected acceleration of free cash flow generation over the remainder of the year, we will continue to evaluate opportunities to repurchase our debt and equity securities balanced against incremental growth opportunities.
Diluted earnings per share from continuing operations for Q1 2012 were $0.40 per share as compared to $0.50 -- $0.57 per share in Q1 2011. Once again, the earnings per share comparison for the first quarter was impacted by fluctuations in the effective tax rate. The effective tax rate for Q1 2012 was approximately 40%, in line with our expectations. However, as Jay mentioned earlier, Q1 2011 included a tax benefit of $0.27 per share related to items such as a settlement with the IRS on prior year tax audits and reductions in unrecognized tax benefits. Cash income tax expense for the quarter was $2.1 million, and we continue to anticipate cash income tax expense in a range of $7 million to $10 million for 2012.
Let's move now to adjusted free cash flow, and you may find it useful to turn to the bridge that is included on Slide 11 of the supplemental slides. Please recall that in 2011, our adjusted free cash flow increased by 34.1% over 2010. As discussed in last quarter's call, we entered 2012 expecting to again generate a significant level of adjusted free cash flow. We noted, however, that the growth in 2012 would reflect anticipated increases in net working capital and maintenance CapEx. Our Q1 2012 adjusted free cash flow reflected these items as it decreased modestly to $45.2 million from $48.2 million in Q1 2011. A significant component of the working capital increase was a $16.4 million decline in accrued interest. This is an interest coupon timing difference related to our refinancing activities, and it will reverse in Q2, thereby, providing a benefit to second quarter adjusted free cash flow. And you may recall that we experienced something very similar in Q3 and Q4 of 2011.
As anticipated and as we discussed in last quarter's call, our net working capital also increased due to a $16.1 million decline in payroll liabilities, primarily attributable to tax withholding payments related to the vesting of a 2009 restricted stock grant to our employees. The combination of these items resulted in a $31 million increase in net working capital for Q1. For 2012, we continue to estimate a year-over-year increase in net working capital in a $30 million to $40 million range.
As anticipated, maintenance CapEx for the quarter was $19.1 million, an increase of approximately $10 million from Q1 2011. As stated previously, we expect maintenance CapEx for 2012 in a range of $75 million to $85 million, with the increase over 2011 primarily attributable to investments in our clinical information system. And be reminded that unlike the acute care hospitals, we are not eligible for the high-tech payment subsidies on this investment, as well as 2 substantial hospital renovation projects. The strong free cash flow generation of our company is allowing us to invest in these enhancements to our core business, fund our compelling growth opportunities and continue to improve our balance sheet.
With that, I'll turn it back to Jay.