Looking at WW1 Attestation papers I notice in the Statement of Service that many seem to be discharged less than a week after enlisting, under "Para 392 (iii) b". This is described as:

"• (iii) Not likely to become an efficient soldier -
• (b) Recruit passed by Medical Officer, but rejected by a Recruiting Officer stationed away from the headquarters of the recruiting area, or by Approving Officer"

Does anyone have an idea of what kind of conditions or characteristics would cause a man to be rejected under this paragraph?