Table 3.

Prevalence/1,000 person-years and concentration of risk (CR) in the top-ventile (both overall and within time-in-service subsamples) of observations with highest predicted risk of first administratively-recorded non-familial major sexual assault victimization by time-in-service among female Regular Army soldiers in the Army STARRS 2004-2009 Historical Administrative Data System (HADS)^a

	Overall ventiles with highest predicted risk						Within time-in-service ventiles with highest predicted riskb
	Prevalence/1,000 person-years		Within-row CR		Proportion of person- months in top- ventile		Prevalence/1,000 person-years		Within-row CR
Years-in- service	Est	(se)	Est	(se)	%	(se)	Est	(se)	Est	(se)
0-1	73.5	2.8	57.1	1.1	23.8	0.5	126.9	8.9	20.5	0.9
1-2	55.1	3.6	31.9	1.4	12.0	0.4	67.6	6.4	16.4	1.1
2-3	50.5	12.7	4.5	0.9	1.0	0.1	37.8	4.7	17.6	1.7
3-4	45.0	19.4	2.6	1.0	0.4	0.1	21.5	3.6	15.7	2.2
4-5	19.8	15.3	1.1	0.8	0.3	0.1	18.6	3.8	15.5	2.7
5-10	27.1	31.1	0.3	0.3	0.0	0.0	13.6	1.8	20.1	2.3
10-20	--c	--c	--c	--c	--c	--c	5.5	1.1	26.6	4.6
20+	--c	--c	--c	--c	--c	--c	1.2	1.2	12.5	11.7
Total	67.3	2.2	33.6	0.7	5.0	0.1	37.6	1.5	18.7	0.6
χ25-7	21.5*		1631.4*		2884.5*		435.3*		15.0*

^*Significant at the .05 level, two-sided test.

^aEstimates are based on the coefficients from the total sample penalized models

^bConcentration of risk ventiles were re-classified independently within each time-in-service group so the top-ventile of predicted risk includes 5% of the person-months within each time-in-service category

^cThere were zero person-months in the overall top-ventile of predicted risk for women with 10+ years-in-service. A five degree of freedom χ² test was used to examine variation in these rates by time-in-service.