Thanks, Miles. As Scott mentioned earlier, please note that all references to sales growth rates, unless otherwise noted, are on an organic basis, which is consistent with our previous guidance.
Turning to our results. Sales for the first quarter increased 7.1%, and exchange had a negative impact of 4.8% on sales versus the prior year. Reported sales increased 2% in the quarter. Regarding other aspects of the P&L. The adjusted gross margin ratio was 58.6% of sales, adjusted R&D investment was 7.4% of sales and adjusted SG&A expense was 32.3% of sales. All of these ratios were in line with previous guidance.
Turning to our outlook for the full year. We continue to forecast organic sales growth of 6.5% to 7.5%. Based on current exchange rates, we would expect exchange to have a negative impact of around 2.5% on our full year reported sales, with the vast majority of the impact expected to occur in the first half of the year. We continue to forecast an adjusted gross margin ratio of somewhat above 59.5% of sales for the full year, which reflects underlying gross margin improvement across our businesses. We continue to forecast adjusted R&D investment of around 7.5% of sales and adjusted SG&A expense of around 29.5% of sales for the full year.
Turning to our outlook for the second quarter. We forecast adjusted EPS of $0.79 to $0.81, which reflects strong double-digit underlying growth, partially offset by the impact of foreign exchange on our results. We forecast organic sales growth of around 7%. And at current rates, we would expect exchange to have a negative impact of around 4% on our second quarter reported sales. We forecasted adjusted gross margin ratio of somewhat above 59% of sales, adjusted R&D investment of a little less than 7.5% of sales and adjusted SG&A expense of around 29.5% of sales. Lastly, we forecast net interest expense of around $150 million in the second quarter.
Before we open the call for questions, I'll now provide a quick overview of our second quarter sales growth outlook by business. For Established Pharmaceuticals, we forecast mid-single-digit growth, which is comprised of mid- to high single-digit growth in our priority key emerging markets along with a modest decline in other EPD sales, which reflects the recent continuation of a noncore, low-margin supply agreement. In Nutrition, we forecast mid-single-digit sales growth. In Diagnostics, we forecast Abbott's legacy Diagnostics business, which is comprised of Core Laboratory, Molecular Point of Care, to grow mid- to high single digits. In Rapid Diagnostics, we forecast low to mid-single-digit sales growth. And in Medical Devices, we forecast high single-digit sales growth, which reflects continued double-digit growth in several areas of this business.
With that, we will now open the call for questions.