Table 2.
Baseline Characteristics by Contraceptive Method
| LNG-IUS (n=1,890) |
Copper-IUD (n=434) |
Implant (n=522) |
DMPA (n=313) |
OCs (n=478) |
Patch (n=99) |
Ring (n=431) |
||
|---|---|---|---|---|---|---|---|---|
| Age (y) | 25.9±5.6 | 28.1±6.3 | 23.2±5.9 | 24.6±6.1 | 23.8±5.1 | 24.1±4.2 | 24.1±4.4 | |
| Race | [lt].001 | |||||||
| African American | 898 (45.7) | 162 (8.2) | 270 (13.7) | 227 (11.5) | 193 (9.8) | 53 (2.7) | 164 (8.3) | |
| White | 857 (45.7) | 229 (12.2) | 211 (11.3) | 66 (3.5) | 245 (13.1) | 39 (2.1) | 227 (12.1) | |
| Others | 128 (41.7) | 41 (13.4) | 38 (12.4) | 19 (6.2) | 38 (12.4) | 7 (2.3) | 36 (11.7) | |
| Education | [lt].001 | |||||||
| High school diploma or less | 613 (43.0) | 125 (8.8) | 282 (19.8) | 162 (11.4) | 131 (9.2) | 30 (2.1) | 81 (5.7) | |
| Some college | 830 (46.8) | 181 (10.2) | 173 (9.8) | 118 (6.7) | 218 (12.3) | 47 (2.7) | 205 (11.6) | |
| College degree or graduate school | 446 (46.0) | 128 (13.2) | 67 (6.9) | 32 (3.3) | 129 (13.3) | 22 (2.3) | 145 (15.0) | |
| Income per month | [lt].001 | |||||||
| None | 269 (39.2) | 67 (9.8) | 141 (20.6) | 69 (10.1) | 78 (11.4) | 11 (1.6) | 51 (7.4) | |
| $1–800 | 542 (41.4) | 123 (9.4) | 182 (13.9) | 106 (8.1) | 166 (12.7) | 44 (3.4) | 145 (11.1) | |
| $801–1,600 | 612 (50.0) | 120 (9.8) | 125 (10.2) | 87 (7.1) | 135 (11.0) | 24 (2.0) | 122 (10.0) | |
| $1,601 or more | 424 (50.7) | 113 (13.5) | 68 (8.1) | 46 (5.5) | 75 (9.0) | 19 (2.3) | 92 (11.0) | |
| Body mass index | [lt].001 | |||||||
| Underweight | 42 (31.3) | 9 (6.7) | 14 (10.4) | 30 (22.4) | 19 (14.2) | 4 (3.0) | 16 (11.9) | |
| Normal | 680 (40.9) | 175 (10.5) | 188 (11.3) | 147 (8.8) | 238 (14.3) | 44 (2.6) | 192 (11.5) | |
| Overweight | 520 (49.1) | 107 (10.1) | 145 (13.7) | 55 (5.2) | 86 (8.1) | 27 (2.5) | 119 (11.2) | |
| Obese | 648 (49.5) | 143 (10.9) | 175 (13.4) | 81 (6.2) | 135 (10.3) | 24 (1.8) | 104 (7.9) | |
| Receiving public assistance | [lt].001 | |||||||
| No | 1,186 (42.6) | 293 (10.5) | 311 (11.2) | 189 (6.8) | 385 (13.8) | 72 (2.6) | 349 (12.5) | |
| Yes | 704 (50.9) | 141 (10.2) | 211 (15.3) | 124 (9.0) | 93 (6.7) | 27 (2.0) | 82 (5.9) | |
| Trouble paying for basic expenses | .002 | |||||||
| No | 1,131 (45.3) | 261 (10.5) | 311 (12.5) | 155 (6.2) | 300 (12.0) | 57 (2.3) | 281 (11.3) | |
| Yes | 759 (45.4) | 173 (10.4) | 211 (12.6) | 158 (9.5) | 178 (10.7) | 42 (2.5) | 150 (9.0) | |
| Insurance | [lt].001 | |||||||
| None | 787 (43.7) | 185 (10.3) | 218 (12.1) | 179 (9.9) | 211 (11.7) | 52 (2.9) | 170 (9.4) | |
| Private | 871 (46.7) | 202 (10.8) | 176 (9.4) | 102 (5.5) | 242 (13.0) | 38 (2.0) | 234 (12.5) | |
| Public | 227 (48.7) | 44 (9.4) | 117 (25.1) | 30 (6.4) | 22 (4.7) | 8 (1.7) | 18 (3.9) | |
| Gravidity | [lt].001 | |||||||
| 0 | 374 (31.6) | 96 (8.1) | 161 (13.6) | 78 (6.6) | 233 (19.7) | 30 (2.5) | 212 (17.9) | |
| 1 | 375 (41.3) | 64 (7.1) | 150 (16.5) | 76 (8.4) | 107 (11.8) | 29 (3.2) | 106 (11.7) | |
| 2 | 398 (52.6) | 84 (11.1) | 77 (10.2) | 53 (7.0) | 78 (10.3) | 16 (2.1) | 51 (6.7) | |
| 3 or higher | 743 (56.3) | 190 (14.4) | 134 (10.2) | 106 (8.0) | 60 (4.5) | 24 (1.8) | 62 (4.7) | |
| Parity | [lt].001 | |||||||
| 0 | 694 (35.0) | 159 (8.0) | 268 (13.5) | 153 (7.7) | 348 (17.5) | 58 (2.9) | 305 (15.4) | |
| 1 | 540 (52.6) | 102 (9.9) | 135 (13.2) | 65 (6.3) | 79 (7.7) | 24 (2.3) | 81 (7.9) | |
| 2 | 416 (57.5) | 97 (13.4) | 74 (10.2) | 53 (7.3) | 37 (5.1) | 14 (1.9) | 33 (4.6) | |
| 3 or higher | 240 (55.6) | 76 (17.6) | 45 (10.4) | 42 (9.7) | 14 (3.2) | 3 (0.7) | 12 (2.8) | |
| Unintended pregnancies | [lt].001 | |||||||
| 0 | 492 (34.9) | 122 (8.7) | 193 (13.7) | 97 (6.9) | 247 (17.5) | 32 (2.3) | 225 (16.0) | |
| 1 | 509 (43.9) | 100 (8.6) | 168 (14.5) | 97 (8.4) | 130 (11.2) | 34 (2.9) | 121 (10.4) | |
| 2 | 368 (52.3) | 84 (11.9) | 77 (10.9) | 54 (7.7) | 61 (8.7) | 15 (2.1) | 45 (6.4) | |
| 3 or more | 516 (58.3) | 127 (14.4) | 83 (9.4) | 63 (7.1) | 38 (4.3) | 18 (2.0) | 40 (4.5) | |
| History of abortion | [lt].001 | |||||||
| No | 1,087 (43.2) | 238 (9.5) | 355 (14.1) | 166 (6.6) | 321 (12.7) | 51 (2.0) | 300 (11.9) | |
| Yes | 803 (48.7) | 196 (11.9) | 167 (10.1) | 147 (8.9) | 157 (9.5) | 48 (2.9) | 131 (7.9) | |
| History of STI | [lt].001 | |||||||
| No | 1,111 (43.8) | 259 (10.2) | 326 (12.9) | 171 (6.7) | 336 (13.3) | 63 (2.5) | 268 (10.6) | |
| Yes | 779 (47.7) | 175 (10.7) | 196 (12.0) | 142 (8.7) | 142 (8.7) | 36 (2.2) | 163 (10.0) | |
| Any current STI | [lt].001 | |||||||
| No | 1,777 (45.5) | 420 (10.8) | 473 (12.1) | 278 (7.1) | 448 (11.5) | 94 (2.4) | 415 (10.6) | |
| Yes | 113 (43.1) | 14 (5.3) | 49 (18.7) | 35 (13.4) | 30 (11.5) | 5 (1.9) | 16 (6.1) |
LNG-IUS, levonorgestrel intrauterine system; IUD, intrauterine device; DMPA, depot medroxyprogesterone acetate; OCs, oral contraceptives; STI, sexually transmitted infection.
Data are mean±standard deviation or n (%) unless otherwise specified.