Table 1.

Baseline characteristics of analytic sample stratified by contraceptive method and age

	Overall (n=4708)		non-LARC (n=1505)		LARC (n=3203)		p-value
Age	Mean	SD	Mean	SD	Mean	SD	<0.001
	25.2	5.7	24.0	5.0	25.7	5.9
Race	N	%	N	%	N	%	0.6 68
Black	2243	47.7	723	48.1	1520	47.5
White	2100	44.6	659	43.8	1441	45.0
Others	364	7.7	122	8.1	242	7.6
Education							<0.001
≤High School	1661	35.3	472	31.4	1189	37.1
Some College	1987	42.2	666	44.3	1321	41.3
College graduate	1058	22.5	366	24.3	692	21.6
BMI							<0.001
Underweight	144	3.1	72	4.9	72	2.3
Normal	1895	41.2	718	49.2	1177	37.4
Overweight	1206	26.2	333	22.8	873	27.8
Obese	1357	29.5	336	23.0	1021	32.5
Low socioeconomic status							<0.001
No	2088	44.4	776	51.6	1312	41.0
Yes	2618	55.6	728	48.4	1890	59.0
Insurance							<0.001
None	2031	43.5	683	46.0	1348	42.4
Private	2081	44.6	711	47.9	1370	43.0
Public	556	11.9	91	6.1	465	14.6
Parity							<0.001
0	2225	47.3	988	65.6	1237	38.7
1	1150	24.4	290	19.3	860	26.8
2	819	17.4	149	9.9	670	20.9
3+	514	10.9	78	5.2	436	13.6
Unintended Pregnancies							<0.001
0	1599	34.0	704	46.9	895	28.0
1	1292	27.5	423	28.2	869	27.2
2	780	16.6	188	12.5	592	18.5
3+	1027	21.9	187	12.5	840	26.3
History of Abortion at Baseline?							<0.001
No	2870	61.0	969	64.4	1901	59.4
Yes	1838	39.0	536	35.6	1302	40.6
History of STI at Baseline							0.011
No	2869	61.0	957	63.6	1912	59.7
Yes	1836	39.0	547	36.4	1289	40.3

^aLARC: long acting reversible contraceptive

^bStandard deviation

^cLow socioeconomic status includes trouble paying for basic necessities or receiving government subsidies in the form of food stamps or welfare

^dSTI: sexually transmitted infection