Nine Months Ended September 30, 2019 Compared to Nine Months Ended September 30, 2018
Net operating revenues decreased by 7.3% to approximately $9.9 billion for the nine months ended September 30, 2019, from approximately $10.7 billion for the nine months ended September 30, 2018. Net operating revenues on a same-store basis from hospitals that were operated throughout both periods increased $400 million, or 4.3%, during the nine months ended September 30, 2019, as compared to the nine months ended September 30, 2018. The increase in same-store net operating revenues was attributable to improved pricing due to higher acuity, and an increase in inpatient admissions.Non-same-store net operating revenues decreased $1.2 billion during the nine months ended September 30, 2019, in comparison to the prior year period, with the decrease attributable primarily to the divestiture of hospitals during 2018 and 2019. On a consolidated basis, inpatient admissions decreased by 11.4% during the nine months ended September 30, 2019 as compared to the nine months ended September 30, 2018. Also on a consolidated basis, adjusted admissions decreased by 11.2% during the nine months ended September 30, 2019 as compared to the nine months ended September 30, 2018. On a same-store basis, net operating revenues per adjusted admission increased 2.0%, while inpatient admissions increased by 1.7% and adjusted admissions increased by 2.3% for the nine months ended September 30, 2019, compared to the nine months ended September 30, 2018.
Operating expenses, as a percentage of net operating revenues, decreased from 97.0% during the nine months ended September 30, 2018 to 95.1% during the nine months ended September 30, 2019. Operating expenses, excluding depreciation and amortization and impairment and (gain) loss on sale of businesses, as a percentage of net operating revenues, increased from 89.1% for the nine months ended September 30, 2018 to 89.8% for the nine months ended September 30, 2019. Salaries and benefits, as a percentage of net operating revenues, remained consistent at 45.3% for both of the nine-month periods ended September 30, 2019 and 2018. Supplies, as a percentage of net operating revenues, decreased from 16.6% for the nine months ended September 30, 2018 to 16.4% for the nine months ended September 30, 2019. Other operating expenses, as a percentage of net operating revenues, increased from 24.7% for the nine months ended September 30, 2018 to 25.3% for the nine months ended September 30, 2019. This increase in other operating expenses, as a percentage of net operating revenues, was primarily due to the change in estimate for professional liability claims expense and the reserve of the outstanding balance of a promissory note received from the buyer in connection with the sale of two of our hospitals in 2017. Expense related to government and other legal settlements and related costs, as a percentage of net operating revenues, increased from 0.1% for the nine months ended September 30, 2018 to 0.4% for the nine months ended September 30, 2019 primarily due to the net impact of several lawsuits settled in principle and related legal expenses. Lease cost and rent, as a percentage of net operating revenues, remained consistent at 2.4% for both of the nine-month periods ended September 30, 2019 and 2018.
Depreciation and amortization, as a percentage of net operating revenues, decreased from 5.0% for the nine months ended September 30, 2018 to 4.6% for the nine months ended September 30, 2019, primarily due to ceasing depreciation on property and equipment at hospitals sold or held for sale.
Impairment and (gain) loss on sale of businesses was $70 million for the nine months ended September 30, 2019, compared to $314 million for the nine months ended September 30, 2018, related to impairment of the long-lived assets and reporting unit goodwill allocated to hospitals classified as held for sale or sold during the respective periods.
Interest expense, net, increased by $62 million to $782 million for the nine months ended September 30, 2019 compared to $720 million for the nine months ended September 30, 2018, which was driven by an increase in interest rates during the nine months ended September 30, 2019, compared to the same period in 2018, which resulted in an increase in interest expense of $78 million. This increase was partially offset by a decrease in our average outstanding debt during the nine months ended September 30, 2019, which resulted in a decrease in interest expense of $12 million, and an increase in major construction projects during the nine months ended September 30, 2019 resulted in $4 million more interest being capitalized, compared to the same period in 2018.
Loss from early extinguishment of debt of $31 million was recognized during the nine months ended September 30, 2019, as a result of the Credit Facility amendment and repayment of the term loans under the Credit Facility as discussed further in Capital Resources. Gain from early extinguishment of debt of $32 million was recognized during the nine months ended September 30, 2018 which resulted primarily from the refinancing and exchange of certain of our outstanding notes and repayment of a portion of our term loans under the Credit Facility as discussed further in Capital Resources.
Equity in earnings of unconsolidated affiliates, as a percentage of net operating revenues, decreased from 0.2% during the nine months ended September 30, 2018 to 0.1% during the nine months ended September 30, 2019.
The net results of the above-mentioned changes resulted in loss before income taxes decreasing $32 million from $347 million for the nine months ended September 30, 2018 to $315 million for the nine months ended September 30, 2019.
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