How To Read Your Resmed Sleep Report Data? Essential Guide

Your ResMed machine records every breath you take at night, and the report it generates can tell you whether your sleep apnea therapy is actually working. The key numbers to find first are usage hours, AHI (apnea-hypopnea index), mask leak, and pressure. Everything else in the report supports those four. This guide explains what each number means, what ranges are generally considered acceptable, and where the data has real limits.

What Is a ResMed Sleep Report and Where Do You Find It?

A ResMed sleep report is a summary of your breathing and machine data recorded during therapy. It is not the same as a sleep study, which is a diagnostic test. This report shows how your treatment performed on a given night or over a set period.

There are three places to find this data:

• On the machine screen. Most ResMed devices show a basic summary when you wake up. You can usually see usage hours, a mask fit indicator, and sometimes AHI, depending on the model and settings.
• myAir app or website. ResMed’s patient platform gives you a daily score and a simplified view of your therapy. It is designed to be easy to read, but it hides some detail.
• SD card data. The SD card in your machine holds the most complete record. Your clinician can read it using ResMed’s clinical software. Some patients also use third-party software to view their own data.

The myAir app is a starting point, not a full picture. It shows trends and a nightly score, but it does not show everything a clinician sees. If you want to understand your therapy in detail, the SD card data is the most complete source.

One thing worth knowing: the report reflects what the machine measured, not how you felt. A perfect score on paper does not always match how rested you feel. Both matter.

How To Read Your ResMed Sleep Report Data: The Four Numbers That Matter

Most of what you need to know comes down to four measurements. Here is what each one means and what to look for.

Usage Hours

This is the number of hours the machine was running while you were using it. It is the simplest and most important measure of whether therapy is happening at all.

For insurance coverage in the United States, the common requirement is at least 4 hours of use per night on a specified percentage of nights. That threshold is a coverage rule, not a medical target. Many clinicians consider more hours better, and using the machine for most of your sleep time is generally the goal.

Usage hours tell you nothing about whether your breathing was well controlled. A person can use the machine all night and still have poorly treated apnea. That is why you need the next number.

AHI (Apnea-Hypopnea Index)

AHI is the average number of apnea and hypopnea events per hour of sleep. An apnea is a complete pause in breathing. A hypopnea is a partial reduction in airflow.

This is the number that tells you whether your apnea is controlled on therapy. Here is how the ranges are generally described:

• Under 5 events per hour: Generally considered well controlled on treatment.
• 5 to 15: Mildly elevated. Worth discussing with your clinician.
• Above 15: Poorly controlled. This usually needs attention.

These ranges come from how sleep medicine classifies apnea severity. On therapy, the goal is usually to get AHI as low as reasonably possible, and under 5 is the common target.

One important limit: the machine calculates AHI from its own sensors. It cannot tell when you are actually asleep. It estimates events based on airflow and breathing patterns. This means the number is useful but not identical to what a sleep lab would measure.

Mask Leak

Leak is the amount of air escaping from your mask or circuit. Some leak is normal and expected. Every mask vents air by design. The problem is unintentional leak, which happens when the mask does not seal well.

ResMed reports leak in liters per minute. There is no single universal cutoff, because it depends on your mask type and your machine’s pressure. As a general guide, your clinician will have a target range for your specific setup. Large or increasing leak is the signal to pay attention to.

High leak matters for two reasons. It can reduce how well the pressure reaches your airway. It can also make the AHI reading less reliable, because the machine may struggle to detect events accurately when leak is high.

If your leak number is high, the fix is usually practical: adjust the mask, check the cushion for wear, or try a different size or style. A mask that fit well a year ago may not fit well now.

Pressure

Pressure is measured in centimeters of water (cm H2O). It is the force the machine uses to keep your airway open.

If you use a fixed-pressure machine, you will see one number. If you use an auto-adjusting machine (APAP), you will see a range, plus the pressure the machine spent most of the night at. This is often shown as a median or a 95th percentile value.

The 95th percentile pressure means the machine was at or below that pressure for 95 percent of the time. It is not the maximum. It is a way of showing the upper end of what you needed.

A pressure that keeps climbing through the night can be a sign of leak, position-related apnea, or another issue. A pressure that stays low and steady with a good AHI usually means things are working.

What Do the Other Numbers on the Report Mean?

Beyond the four main measures, you may see several other values. These are useful but secondary.

• Central apnea index. Central apneas happen when the brain does not signal the muscles to breathe. These are different from obstructive apneas, where the airway is blocked. A rising central index on therapy is something to raise with your clinician, not something to self-diagnose.
• Flow limitation. This reflects partial narrowing of the airway. It can help explain why pressure increases even when AHI looks fine.
• Snore index. A measure of snoring vibrations detected by the machine. It is a rough signal, not a precise count.
• Respiratory rate. Your average breaths per minute during therapy.
• Minute ventilation. The total volume of air you breathe per minute.
• Usage pattern. When you started and stopped therapy through the night. Frequent gaps can point to discomfort or mask problems.

These values are most useful when looked at together and over time. A single night rarely tells the full story. Trends across weeks are more informative than any one reading.

How Often Should You Check Your Sleep Report Data?

Checking your data regularly helps you catch problems early. How often depends on your situation.

When you are new to therapy, or when you have just changed masks or settings, looking at your data every few days can help you adjust. Once things are stable, a weekly or monthly check is often enough for most people.

Your clinician will typically review your data at follow-up visits. Medicare and many insurers cover follow-up in the first months of therapy and periodically after that. These visits are a good time to bring your questions about specific numbers.

Do not make changes to your machine settings on your own. Pressure settings are prescribed for a reason, and changing them without guidance can reduce how well therapy works or cause discomfort. If your data concerns you, that is a conversation to have with your care team.

What Your Report Cannot Tell You

Your machine report is a tool, not a diagnosis. It has real limits, and knowing them matters.

The machine cannot tell when you are asleep. It estimates events based on breathing patterns, so its AHI is an approximation, not a lab-grade measurement. It also cannot detect every type of breathing problem. It does not measure how rested you feel, your daytime sleepiness, or your overall health.

A good report and feeling good is the ideal combination. A good report with ongoing fatigue is worth mentioning to your clinician, because it may point to something the machine cannot see. A poor report is a reason to look closer, not to panic.

The report is one piece of a larger picture that includes your symptoms, your sleep study history, and how you feel day to day. Use it as a guide, and bring your questions to the people who know your full history.