The phrase "although it was highest" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding something that is considered the highest in a particular context.
Example: "Although it was highest on the list, the project was not prioritized for funding."
Alternatives: "even though it was the highest" or "despite being the highest".
An enhanced risk of second primary tumours was evident for the entire period after treatment of the first primary, although it was highest within one year after diagnosis of the first primary.
Although it was highest in the subgroup of patients who initiated both psychotherapy and pharmacotherapy, 48.8% of patients started with the combination treatment at baseline, despite the fact that patients were all "newly" diagnosed with ADHD; this rate is much higher than that for East Asia (17.1%).
The friction coefficient of TiAlN coatings became lower than that of TiN coatings at high sliding speed although it was higher at low speed.
The relative viscosity was also decreased even at 80 °C, although it was higher at that temperature than at the other temperatures.
The disease control rate (response plus stable disease) also decreased dramatically from first- to fourth-line treatment, although it was higher for second-line treatment (74.4%) than for first-line treatment (62.8%).
The partial occupancy of the site in the crystal also suggests that the affinity was not very high, although it was higher than those of average LNS domains.
Mean fasting glucose was normal in CAD patients, although it was higher than in control subjects.
The observed response rate in this study was not high, although it was higher than expected when compared with a previous study [ 22].
The response rate to the long term evaluation questionnaire was relatively low, although it was higher when compared to other Taiwanese studies.
Mean systolic blood pressure was within normal range, although it was higher in patients compared with controls (128 ± 12 mmHg vs. 116 ± 10 mmHg, P < 0.001).
Gingivitis was most prevalent among overweight subjects, although it was high in all BMI categories, with no clear pattern of association.
