In the archive of the Livonian Governor General there are a couple of volumes dedicated to medical matters (EAA.278.1.XI-3 and 4). The latter of these contain material from the GNW, for examples lists of soldiers deemed unfit for further service. Some examples for the Österbotten infantry, 3 May 1705:
Nils Tarkolaby, 71 years old, has served for 49 years. Old and has an old wound in the legs which he got in the Scanian War.
Erik Petolax, 60 years old, has served for 34 years. Cannot march or stand guard.
Jonas Jöös, 70 years old, has served for 37 years. Of the Brabant recruits. Old and incapable.
Philip Kåudoby, 58 years old, has served for 46 years. Weak eyesight, chest defective, toes frozen off on the march through Prussia (1678-79, ny note)
Thomas Ulfwä, 82 years old, has served for 44 years. Old and incapable.
Thomas Parkarij, 26 years old, has served fo 4 years. Confused and melancholic.
Some examples from a similar list, dated 8 May 1705:
Sven Jung of the Life Guards. Wounded in the foot at Düna. Have been bedridden for two years. Still considered incapable of marching. Permitted to go to Stockholm and join the Guard detachment there.
Nils Sohlberg of "Svenska Adelsfanan". The right eye cut out during the battle of Jacobstadt. 60 years old, has served for 27 years, incapable of further service.
Nils Galle of "Dalregementet". More than 60 years old, wounded in the previous war, has served for 35 years. His legs are paralysed and the left arm useless.
Henrik Larsson of Col. Patkull's cavalry. Wounded more than 40 times, the right hand paralysed. Useless.
Hans Meijer of Lt. Col. Lorentz corps. His horse fell on him in Lithuania. Broke his right leg, uses a crutch. Has served for 24 years. The leg is stiff and the right hand paralysed. Useless.