A newborn has a positive newborn screen for congenital adrenal hyperplasia (CAH). What is an appropriate early management strategy for this infant?

A CBC is obtained on a 5 week old former 28 week male infant as part of a workup for increasing desaturation spells and mild tachycardia. The CBC shows a WBC count of 11K with no left shift, a Hgb of 7 g%, a Hct of 29%, and platelets of 192K. These findings are indicative of:

The trace elements used in TPN that should be adjusted in patients with liver failure are:

Which of the following is a TRUE statement regarding 21-hydroxylase deficiency?

A 5-day-old preterm infant with a birth weight of 1.4 kg is now 10% below birth weight. The current serum sodium is 132 mEq/L and blood glucose values have ranged from 62–69 mg/dL over the past 24 hours. The infant is receiving TPN containing D11W at 7.5 mL/hr via a PICC line, providing 2 mEq/kg/day of sodium. A UAC infusing 1/2 normal saline at 1 mL/hr is being discontinued today. Which fluids provide the best sodium and glucose infusion rate (GIR) management for this infant?

An individual has normal thresholds from 250 – 2 kHz and has threshold of 30 dB HL at 4 kHz and 8 kHz. With reference to the speech banana in the below figure, which of the speech sounds does he find it difficult to hear at (i) normal conversation level and (ii) when you whisper? 

We have data from an experiment and we want to use subgroups to improve precision. Which subgroups would be most helpful to focus on?

Questions 6-8 refer to the following information. levels.fyi is a company that provides job seekers with compensation data. As people negotiate job offers from companies, they can use levels.fyi to see what other job seekers have gotten. For example, someone with a job offer from Meta to be a product manager can see what Meta product managers typically get in compensation. This service is free. levels.fyi also offers a paid negotiation coaching service which costs $1000. Only about 1% of their users actually pay for this service, and levels would like to increase this share. They ran an experiment offering a discounted price of $500 to a random subset of users. Given their prices and costs, levels.fyi determined that they would want to lower the price for everyone, if the lower price caused an increase in take-up of coaching of at least 0.04 on average. Some data from the experiment are in the table below:   Group Sample size Coaching  take-up average Coaching take-up standard deviation Control ($1000 price) 1,225 0.011 0.10 Treatment ($500 price) 1,225 0.020 0.17

What is the definition of a noisy estimate?

A professional sports team collects data on the sleep habits of its players. They notice that sleeping at least 7 hours the night before a game is associated with performing better in the game the next day. If we are interested in the effect of sleep length on game performance, which of the following would be a confound?