What the Analytics window shows

Open it and pick a range

Click “Analytics” in the popover, or click a Profile card. Pick a Profile and a range: the last 7 days, 14 days, 30 days, 3 months, 6 months or the last year. The sidebar holds five views: Overview, AGP, Highs vs Lows, Patterns and Observations.

A range shows what your server holds, so a year of data appears only if your Nightscout holds a year. Analytics keeps a copy of up to one year of readings on this Mac, and the copy never leaves it.

Overview

Time in range counts the readings between 70–180 mg/dL and splits the rest into very low, low, high and very high. Beside it sit average glucose, GMI, variability (CV), sensor coverage and the change against the previous period.

GMI is an estimate calculated from your average glucose: 3.31 + 0.02392 × average glucose in mg/dL. It may differ from a lab HbA1c.

Next to the values, the Overview shows the adult consensus targets. Your care team may set different goals.

AGP

AGP stands for Ambulatory Glucose Profile. The view is GluScout’s take on the standard 24-hour glucose profile, often called an AGP report. It folds every day in the range into one typical day: the median as a line, with bands for the 25th–75th and the 5th–95th percentile.

Bands appear for time slots with data on 5 or more days. Where there is less, only the median shows. Times follow the time zone of the monitored person’s Nightscout, or this Mac’s when none is given.

Highs vs Lows

The view counts episodes. A low is a stretch below its threshold for at least 15 minutes, and a high is a stretch above its threshold for at least 15 minutes. The high rule is GluScout’s own, not a published consensus definition. For each kind you see how many there were, the time of day they started, the median duration and the longest.

It also counts highs that started within 2 hours after a low ended, and fast drops. A gap of more than 15 minutes between readings ends an event.

Patterns

“Times of day that recurred” lists blocks of the day in which events started on enough different days, each day counted once. The heatmap shows events by weekday and hour. Select a cell to see its count and dates. Cells with too few events are dimmed, because that is too few to say anything about that hour.

Observations

Observations are plain descriptions of your data. Each one shows its evidence: the value, the number of readings and days, and the range. They describe what happened, give no advice and use neutral colours, not alarm colours.

• Low events recurred between 04:00–06:00. They started on 10 different days.

  10 events · 8,640 readings / 31 days · Last 30 days

• Glucose fell by 3 mg/dL per minute or more over 15 minutes. 89 episodes in this range.

  89 drops · 8,640 readings / 31 days · Last 30 days

• Very high events (above 250 mg/dL) recurred between 14:00–16:00. They started on 4 different days.

  4 events · 8,640 readings / 31 days · Last 30 days

When sensor data covers less than 70% of the days in a range, an Observation says its numbers may be off.

How much data is behind it

“Limited data” appears when a range holds fewer than 14 days of readings. Sensor coverage is the share of expected readings that are present. Below 70% the results may be off, and GluScout shows “Low coverage”. Every Observation names the readings and days it rests on.