erhöht
increased
Being above the normal or average level in amount, level, or degree.
Patienten mit erhöhtem Blutdruck müssen vorsichtig sein.
Patients with increased blood pressure must be careful.

increased / elevated
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increased
Being above the normal or average level in amount, level, or degree.
Patienten mit erhöhtem Blutdruck müssen vorsichtig sein.
Patients with increased blood pressure must be careful.

'Erhöht' (increased/elevated) is the past participle of the verb 'erhöhen' (to increase / to raise). It describes a state that is the result of 'making higher.' The prefix 'er-' often signals the bringing about of a new state.
Die Regierung hat die Steuern erhöht.
The government increased the taxes.
The word belongs to the family of 'hoch' (high) and 'die Höhe' (height). If you know these words, you can more easily infer the meaning of 'erhöht' (increased/elevated).
Der Berg hat eine Höhe von 3000 Metern.
The mountain has a height of 3,000 meters.
You can distinguish the meanings well from context. If 'erhöht' refers to measurable, abstract things such as values or risks, the first meaning is intended. If it refers to a physical position, the second meaning is intended.
Er hat erhöhte Leberwerte.
He has elevated liver values.
In connection with measured values, 'erhöht' is used very frequently. Typical combinations are 'erhöhter Blutdruck' (increased blood pressure), 'erhöhte Temperatur' (elevated temperature), 'erhöhtes Risiko' (increased risk), and 'erhöhte Cholesterinwerte' (elevated cholesterol levels).
Bei Fieber hat man eine erhöhte Körpertemperatur.
When you have a fever, you have an elevated body temperature.
In the meaning of 'heightened prestige' or 'more important,' 'erhöht' belongs to an elevated, formal style. You are more likely to find it in written language.
Der Direktor genießt in der Firma eine erhöhte Stellung.
The director enjoys an elevated position in the company.
high
'hoch' and 'erhöht' can both mean that something is above a normal or low level. 'hoch' is the general, very common word: 'ein hoher Preis' (a high price), 'ein hoher Berg' (a tall mountain), or 'eine hohe Position' (a high-ranking position). 'erhöht' sounds more precise and often somewhat more formal. It emphasizes that a value, a risk, or a location is higher than normal, or that something has been raised. Learners may confuse the words because both can fit with numbers, values, and positions. In everyday language, 'hoch' is often more neutral; 'erhöht' is especially appropriate when you mean a comparison with the normal level.

In der Innenstadt gilt wegen der Baustelle ein erhöhtes Unfallrisiko.
Because of the construction site, there is an increased risk of accidents in the city center.
Die Regale in der Bibliothek sind so hoch, dass ich einen Hocker brauche.
The shelves in the library are so high that I need a stool.