Table 1.
Study participant characteristics at enrollment
| Total sample (N=55) | Chose DMPA-SC self- administrat ion (N=19) | Chose not to self- administer DMPA-SC (N=10) | Discontinued DMPA (N=8) | Lost to follow-up (N=18) | p-value | |
|---|---|---|---|---|---|---|
|
| ||||||
|
Race % (n)*
| ||||||
| African American | 83.6 (46) | 89.5 (17) | 70.0 (7) | 62.5 (5) | 94.4 (17) | 0.174 |
| White | 9.1 (5) | 5.3 (1) | 30.0 (3) | 12.5 (1) | 0 (0) | |
| Hispanic | 1.8 (1) | 0 (0) | 0 (0) | 0 (0) | 5.6 (1) | |
| Other/missing | 5.5 (3) | 5.3 (1) | 0 (0) | 25.0 (2) | 0 (0) | |
|
| ||||||
|
Age in years mean (SD)
| ||||||
| 16.5 (1.6) | 16.3 (1.6) | 15.8 (0.6) | 17.2 (2.1) | 16.9 (1.6) | 0.141 | |
|
| ||||||
|
Highest educational grade level mean (SD)
| ||||||
| 9.2 (1.8) | 8.9 (2.0) | 8.5 (1.0) | 10.3 (1.7) | 9.4 (1.8) | 0.164 | |
|
| ||||||
|
Highest maternal education % (n)*
| ||||||
| Some HS | 47.3 (26) | 36.8 (7) | 30.0 (3) | 62.5 (5) | 61.1 (11) | 0.610 |
| HS Graduate | 30.9 (17) | 26.3 (5) | 50.0 (5) | 37.5 (3) | 22.2 (4) | |
| GED | 5.5 (3) | 5.3 (1) | 10.0 (1) | 0 (0) | 5.6 (1) | |
| Some College | 7.3 (4) | 15.8 (3) | 0 (0) | 0 (0) | 5.6 (1) | |
| College Grad | 9.1 (5) | 15.8 (3) | 10.0 (1) | 0 (0) | 5.6 (1) | |
|
| ||||||
|
Age in years at menarche mean (SD)
| ||||||
| 11.8 (1.5) | 12.1 (1.6) | 12.0 (1.5) | 11.1 (1.3) | 11.6 (1.5) | 0.497 | |
|
| ||||||
|
Years menstruating mean (SD)
| ||||||
| 4.7 (2.1) | 4.1 (1.3)ab | 3.7 (1.8) | 6.3 (3.2)a | 5.3 (1.9)b | 0.026 | |
|
| ||||||
|
Have never had sex % (n)
| ||||||
| 20.0 (11) | 10.5 (2) | 40.0 (4) | 25.0 (2) | 16.7 (3) | 0.296 | |
|
| ||||||
|
Previous Pregnancy % (n)
| ||||||
| 7.3 (4) | (1) | 0 | (2) | (1) | 0.164 | |
|
| ||||||
|
Prior use of hormonal contraceptive methods % (n)
| ||||||
| No prior method | 41.8 (23) | 26.3 (5) | 70.0 (7) | 37.5 (3) | 44.4 (8) | 0.091 |
| DMPA | 25.5 (14) | 31.6 (6) | 10.0 (1) | 12.5 (1) | 33.3 (6) | |
| COC | 32.7 (18) | 36.8 (7) | 20.0 (2) | 37.5 (3) | 33.3 (6) | |
| Patch | 20.0 (11) | 15.8 (3) | 20.0 (2) | 50.0 (4) | 11.1 (2) | |
| Ring | 1.8 (1) | 0 (0) | 0 (0) | 12.5 (1) | 0 (0) | |
| >1 prior method | 14.5 (8) | 10.5 (2) | 10.0 (1) | 37.5 (3) | 11.1 (2) | |
|
| ||||||
|
Condom at first sex % (n)
| ||||||
| 65.5 (36) | 78.9 (15) | 40.0 (4) | 62.5 (5) | 66.7 (12) | 0.389 | |
|
| ||||||
|
Condom at last sex % (n)
| ||||||
| 56.4 (31) | 73.7 (14) | 30.0 (3) | 50.0 (4) | 55.6 (10) | 0.437 | |
Analysis of variance (ANOVA) was used for continuous outcomes and Pearson’s chi-square analysis was used for categorical outcomes
*
Added percentages range from 100.0–100.1 due to rounding of decimals.
a,b
Values which share a superscript differ from one another at p<0.05 in difference in means t-test.