Glenn Boehnlein
Vice President and Chief Financial Officer at Stryker
Thanks, Jason. Today I will focus my comments on our fourth quarter financial results and the related drivers, our detailed financial results have been provided in today's press release.
Our organic sales growth was 11.4% in the quarter compared to 13.2% organic growth in the fourth quarter of 2022. The fourth quarter of 2023 had the same number of selling days as 2022. The impact from pricing in the quarter was favorable by 0.7%. We continue to see a positive trend from our pricing initiatives, particularly in our MedSurg and Neurotech businesses, all of which contributed positive pricing for the quarter. Foreign currency had a 0.3% favorable impact on sales in the quarter.
In the quarter. US organic sales growth was 12.7%, International organic sales growth was 7.7% against a very strong comparable of over 18% in 2022. This performance included positive sales momentum across most of our international markets, particularly Australia, Canada, Japan and most emerging markets.
For the year, organic sales growth was 11.5%, with US organic sales growth of 11.7% and international organic sales growth of 10.9%. Excluding the impact of China VBP, international growth was 12.8%. The impact for pricing in the year was favorable 0.6%. Foreign currency had a 0.5% unfavorable impact and 2023 had the same number of selling days as 2022.
Our adjusted EPS of $3.46 in the quarter was up 15.3% from 2022, driven by higher sales and operating margin expansion, as well as lower other income and expenses. Foreign currency exchange translation had a favorable impact of $0.02. Our full-year adjusted EPS was $10.60, which represents growth of 13.5% from full-year 2022, reflecting the favorable impact of sales growth and operating margin expansion. Partially offset by the unfavorable impact of foreign currency exchange translation of $0.10.
Now. I will provide some highlights around our quarterly segment performance. In the quarter, MedSurg and Neurotechnology had constant-currency sales growth of 12% and organic sales growth of 11.8%, which included 13.8% of US organic growth and 5.7% of international growth. Instruments had US organic sales growth of 11.5% with strong double-digit growth across its surgical technology and orthopedic instruments businesses. From a product perspective, sales growth was led by power tools, Sterishield, Smoke Evacuation and surge account.
Endoscopy had US organic sales growth of 17.9% with double-digit growth in its communications, Endo B.U. and sports medicine businesses. From a product perspective, this included strong growth in booms, lights and video. During the quarter the Endoscopy business continued to see very strong momentum of the 1788 camera system, which had its full launch in September.
Medical had US organic sales growth of 12.9%, led by performances in its Vocera, Acute Care and Sage businesses. This included strong growth in Vocera badges, steths, stretchers and Prevalon repositioning products. All of this was against a very strong comparable growth of over 20% in 2022. Neurovascular had US organic sales growth of 7.6%, reflecting solid performance in our hemorrhagic business. Neurocranial had US organic sales growth of 14%, which included double-digit growth in the neurosurgical and ENT businesses with strong growth in high-speed drill and balloon dilation products.
Internationally, MedSurg and Neurotechnology had organic sales growth of 5.7%, reflecting double-digit growth in our Instruments and Neurocranial businesses. Geographically, this included strong performances in Australia, Canada and Japan. Orthopaedics and Spine had constant-currency and organic sales growth of 10.7% which included organic growth of 10.9% in the US and 10.1% internationally. Our US knee business grew 12.9% organically, which reflects our market-leading position in robotic-assisted knee procedures. Our US -- our US hip business also grew 12.9% organically, reflecting solid primary hip growth fueled by our Insignia Hip Stem. Our US Trauma and Extremities business grew 12.1% organically with strong performances across all of its businesses, including upper extremities, biologics, core trauma and foot and ankle.
Our US spine business grew 6%, led by the performance in our enabling technology and Interventional Spine businesses. Internationally Orthopaedics and Spine grew 10.1% organically, including strong performances in Canada and most emerging markets, particularly driven by Mako and strong knee performance across most geographies.
Now I will focus on operating highlights in the fourth quarter. Our adjusted gross margin of 63.9% was favorably -- was favorable approximately 120 basis points from the fourth-quarter of 2022. This improvement was primarily driven by the continued easing of certain cost pressures, including the elimination of spot buy purchases that we experienced in 2022 and the continued benefit of pricing initiatives. Adjusted R&D spending was 5.6% of sales, which was 10 basis points higher than the fourth-quarter of 2022.
Our adjusted SG&A was 31% of sales, which was 40 basis points higher than the fourth-quarter of 2022 due to continued investments, including sales growth incentives and a more normalized cadence of travel and meetings. In summary, for the fourth-quarter, our adjusted operating margin was 27.2% of sales, which was approximately 60 basis points favorable to the fourth-quarter of 2022.
For the full-year, our adjusted operating margin was 24.2% of sales, a 40 basis points increase over 2022. This performance was mainly driven by the easing of certain gross margin cost pressures throughout the second-half of the year, as well as the positive impact of our pricing actions. Adjusted other income and expense of $31 million for the quarter was $23 million lower than 2022, mainly driven by higher interest income and other favorable discrete items. For 2024, we expect our full-year other income and expense to be approximately $250 million. Our fourth-quarter and full-year had an adjusted effective tax rate of 14.6% and 14.1%, respectively, reflecting the impact of geographic mix and certain discrete tax items. For 2024, we expect our full-year effective tax rate to be in the range of 14% to 15%.
Focusing on the balance sheet, we ended the year with $3 billion of cash and marketable securities and total debt of $13 billion. During the year, we paid down the remaining $850 million outstanding on the $1.5 billion term loan associated with the Vocera acquisition and achieved our deleveraging commitments. In Q4, we also refinanced certain debt maturities, including pre-funding of $600 million that is due in May 2024.
Turning to cash flow, our year-to-date cash from operations was $3.7 billion. This performance reflects the results of net earnings and higher accounts receivable collections. For 2024, we anticipate that capital spending will be $650 million to $700 million. We do not anticipate any share buybacks.
And now I will provide 2024 full-year sales and earnings guidance. Based on our momentum from 2023 strong procedural volumes, healthy demand for capital products, and a stabilizing macro-economic environment we expect organic sales growth to be in the range of 7.5% to 9% for 2024. There is one additional selling day in 2024 compared to 2023 with one less day in Q1 and one more day in both Q3 and Q4. Based on the steady progress of our pricing actions, we would expect the full-year impact of price to be roughly flat.
If foreign exchange rates hold near current levels, we anticipate sales will be modestly unfavorably impacted for the full-year being more negative in the first-half of the year. EPS will be negatively impacted $0.05 to $0.10, this is included in our guidance. Finally, for the full-year 2024, we expect adjusted net earnings per diluted share to be in the range of $11.70 to $12, representing our commitment to accelerated operating margin expansion in 2024 as well as the stabilized -- stabilizing operating environment. While we do not provide quarterly guidance, we do expect seasonality for sales and related earnings to be similar to 2023, but adjusted for the quarterly differences in 2024 selling days.
And now I will open up the call for Q&A.