Perfect Pitch and Aging

Private lessons on piano at 7, later violin around 10, lessons stopped at 13, played in orchestra till 18. Stopped for 38 years. Had perfect pitch before 18 years. 38 years later I'm off about 1/2 to 1 note although getting better especially on the primary instrument, violin. Anyone else have this experience? There's at least one published article on the distortion of pitch with age. I was just wondering if it was more because I stopped playing for decades.