TABLE 4-7 Risk of Attrition by Body Mass Index (BMI) and 1-Minute Run Time

 

Fast Run Time (25%)

Medium Run Time (50%)

Slow Run Time (25%)

 

Attrition Risk

Risk Ratio (95% CI)

Attrition Risk

Risk Ratio (95% CI)

Attrition Risk

Risk Ratio (95% CI)

Total

Men

Low BMI (25%)

6.0%

1.0 (referent)

10.1%

1.7 (1.0, 2.9)

16.1%

2.7 (1.4, 5.1)

9.5%

Medium BMI (50%)

6.1%

1.0 (0.6, 1.8)

7.0%

1.2 (0.7, 2.0)

16.2%

2.7 (1.6, 4.6)

8.6%

High BMI (25%)

6.6%

1.1 (0.4, 3.2)

6.8%

1.1 (0.6, 2.1)

14.3%

2.4 (1.4, 4.1)

10.2%

Total

6.1%

 

7.7%

 

15.4%

 

9.2%

Women

Low BMI (25%)

7.2%

1.0 (referent)

15.3%

2.1 (1.1, 4.0)

25.6%

3.5 (1.8, 7.2)

14.4%

Medium BMI (50%)

7.6%

1.0 (0.5, 2.1)

14.1%

2.0 (1.1, 3.6)

30.5%

4.2 (2.3, 7.8)

15.8%

High BMI (25%)

10.3%

1.4 (0.6, 3.5)

15.9%

2.2 (1.1, 4.2)

33.7%

4.7 (2.5, 8.6)

21.8%

Total

7.9%

 

14.8%

 

30.8%

 

16.9%

NOTE: BMI = body mass index.

SOURCE: Jones, Darakjy, and Knapik (2004). U.S. Army Center for Health Promotion and Preventive Medicine. Previously unpublished data from samples of male and female trainees at Fort Jackson, South Carolina, 2001, 2003. See Figure 4-4 for cutpoints used to define categories.



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