Table 3.

Multivariate model results by BMI group, training group and site of injury

Training group	Weight group	Foot and ankle	Shin	Knee	Hip and pelvis	Back	Neck	Shoulder	Upper limb	Other	Total injuries
Infantry (n = 41,870)	Injury rate	14.9%	6%	17.1%	1.4%	17.3%	0.5%	3.7%	2.8%	21.2%	52.2%
	Underweight	↓
	Low-normal	R	R	R	R	R	R	R	R	R	R
	High-normal	↑				↑		↑			↑
	Overweight	↑		↑	↑	↑					↑
	Obese	↑		↑		↑					↑
Armor (n = 20,638)	Injury rate	13.1%	5.2%	16.3%	1.2%	18.8%	0.5%	2.8%	2.9%	22.4%	51.6%
	Underweight	↓
	Low-normal	R	R	R	R	R	R	R	R	R	R
	High-normal	↑	↓							↑
	Overweight	↑		↑		↑		↑		↑	↑
	Obese	↑		↑						↑	↑
Intelligence (n = 10,304)	Injury rate	8%	0.8%	6.5%	0.4%	8.6%	0.6%	1.7%	1.9%	9.3%	27%
	Underweight			↓		↓					↓
	Low-normal	R	R	R	R	R	R	R	R	R	R
	High-normal	↑		↑							↑
	Overweight	↑		↑							↑
	Obese	↑			↑	↑				↑	↑
Total (n = 72,812)	Injury rate	13.4%	5%	15.4%	1.2%	16.5%	0.5%	3.1%	2.7%	19.9%	48.5%
	Underweight	↓		↓				↓	↓		↓
	Low-normal	R	R	R	R	R	R	R	R	R	R
	High-normal	↑	↓			↑					↑
	Overweight	↑	↓	↑	↑	↑		↑		↑	↑
	Obese	↑		↑	↑	↑				↑	↑

Soldiers were categorized by training type and BMI group (left two columns). ↑ indicates that in this training type and BMI group there was a significantly higher rate of injuries than in the normal BMI (R, reference) group, for the injury type (top row). ↓ indicates that in this training type and BMI group there was a significantly lower rate of injuries than in the normal BMI group. As a soldier could have more than one injury, the total injury rate (right column) is not the arithmetical sum of the subgroups (top row for each training type).