Table 3.

Iron and iodine disorders among US Military Personnel by Demographic characteristics (1997–2015)

Disorder	Variable	Strata	Men				Women
			Cases(n)	Incidence rate (cases/100 000 person-years)	Incident rate ratio	95 % CI	Cases (n)	Incidence rate (cases/100 000 person-years)	Incident rate ratio	95 % CI
Iron	Sex		9224	41·1	1·00		18 157	474·84	11·55	11·27, 11·84
	Age, years	< 20	1070	66·52	1·00		3785	1148·80	1·00
		20–24	1957	27·29	0·41	0·38, 0·44	5552	419·20	0·36	0·35, 0·38
		25–29	1365	27·71	0·42	0·38, 0·45	2748	310·03	0·27	0·26, 0·28
		30–34	1168	33·87	0·51	0·47, 0·55	1932	355·19	0·31	0·29, 0·33
		35–39	1430	48·98	0·74	0·68, 0·80	1954	485·74	0·42	0·40, 0·45
		≥ 40	2234	94·52	1·42	1·32, 1·53	2186	648·30	0·56	0·54, 0·59
	Race	White	5266	33·19	1·00		6434	306·02	1·00
		Black	2701	74·15	2·23	2·13, 2·34	9324	834·29	2·73	2·64, 2·81
		Other	1257	42·89	1·29	1·22, 1·37	2399	397·34		1·24, 1·36
	Service	Army	3499	42·43	1·00		7081	516·62	1·00
		Navy	2245	39·88	0·94	0·89, 0·99	4239	430·21	0·83	0·80, 0·87
		Air Force	2695	50·92	1·20	1·14, 1·26	6129	492·20	0·95	0·92, 0·99
		Marines	785	24·00	0·57	0·52, 0·61	708	318·00	0·62	0·57, 0·66
Iodine	Sex		3540	15·78	1·00		5976	156·28	9·91	9·50, 10·33
	Age, years	<20	57	3·54	1·00		175	53·11	1·00
		20–24	486	6·78	1·91	1·45, 2·52	1320	99·67	1·88	1·60, 2·20
		25–29	631	12·81	3·62	2·76, 4·74	1449	163·48	3·08	2·63, 3·60
		30–34	616	17·86	5·04	3·84, 6·61	1088	200·03	3·77	3·21, 4·42
		35–39	705	24·15	6·82	5·20, 8·93	966	240·04	4·52	3·85, 5·31
		≥40	1045	44·21	12·48	9·56, 16·29	978	290·04	5·46	4·65, 6·41
	Race	White	2441	15·39	1·00		2623	124·76	1·00
		Black	696	19·11	1·24	1·14, 1·35	2619	234·34	1·88	1·78, 1·98
		Other	403	13·75	0·89	0·80, 1·00	734	121·57	0·97	0·90, 1·06
	Service	Army	1330	16·13	1·00		2175	158·69	1·00
		Navy	702	12·47	0·77	0·71, 0·84	1213	123·10	0·78	0·72, 0·83
		Air Force	1150	21·73	1·35	1·25, 1·46	2377	190·89	1·20	1/0·14, 1·28
		Marines	358	10·94	0·68	0·60, 0·76	211	94·77	0·60	0·52, 0·69