Hand
washing with soap and water
•After
defecation [36%]
–(RR
0.61; 95% CI: 0.39 to 0.93, P=0.006).
•After
both urination and defecation [7%]
–(RR
0.11 ; 95% CI: 0.04 to 0.31, P<0.001).
•Comparison:
always disinfecting water [43%]
–(RR
0.65, 95% CI 0.53 to 0.81, P=0.001).
Boulware DR, Forgey WW, Martin WJ. Medical Risks
of Backpacking. Am J Med 203; 114:
288-293.