What is the trend?
The trend value tells you whether your measurements tend to go up, go down, or stay about the same over time.
- The arrow indicates the direction: upward means increasing, downward means decreasing.
- The number next to it indicates how much the value changes per day on average. Example: „↓ -1.1“ means that the value decreases by about 1.1 points per day on average.
- The percentage in parentheses (Rē) indicates how reliable this trend is. A value of 64% means that the pattern shown is quite likely to actually exist. The more values available for the calculation, the more reliably the trend can be assessed. Below 50%, no trend is shown because it would not be meaningful enough.
In short: The trend summarizes your past measurements for the chosen display period and shows whether a value has increased, decreased, or barely changed over time.
Imagine you regularly measure your blood pressure. Each individual reading may be slightly higher one time and slightly lower another time – depending on how you feel that day, your stress level, or how rested you are. This makes it difficult to see at a glance whether your blood pressure is actually changing.
The trend value helps: it smooths out the fluctuations and shows whether your blood pressure is overall rising, falling, or staying stable over time.
This lets you see whether your blood pressure readings are moving in the desired direction over the long term – for example, whether a treatment or lifestyle change is having an effect.
If no trend is shown, there can be several reasons:
- Insufficient statistical strength (Rē value)
For a trend to be shown, the calculation must reach a minimum level of reliability. If the statistical strength (Rē) is below 50%, the system hides the trend. Reason: the direction would be too uncertain and could be misleading. - Measurements without a clear trend
If your blood pressure measurements fluctuate significantly, with no discernible upward or downward line, the calculation will not produce a stable trend. It is like a scale that sometimes shows a little more and sometimes a little less – without a clear pattern emerging over time. - Measurement period too short
A trend requires measurements over a sufficient period of time. Even if many measurements are available, if they cover only a few days, there is not enough data to show a reliable trend.
When is the Rē value below 50?
The Rē value tells you how well the trend line represents reality. A value of 100% means: all measurements lie perfectly on a line. A value of 0% means: the measurements are completely irregularly distributed.
A value below 50% occurs when the values show a general direction but also include many fluctuations or outliers. The “straight line” then fits the actual measurements only moderately well. This does not mean that your measurements are unusable – only that the fluctuations are large enough to make the trend appear statistically less clear.
A value below 50% occurs when the values show a general direction but also include many fluctuations or outliers. The “straight line” then fits the actual measurements only moderately well. This does not mean that your measurements are unusable – only that the fluctuations are large enough to make the trend appear statistically less clear.
