TABLE 1—
Baseline Characteristics of the Intent-to-Treat Population in a Cluster–Randomized Controlled Trial on the Impact of Text-Messaging Programs on Reproductive Health Among Adolescent Girls in Ghana: 2014
| Characteristic | Control | Unidirectional | Interactive |
| No. of clusters | 12 | 12 | 10 |
| No. of total participants | 293 | 258 | 205 |
| Median participants per cluster (range) | 22.5 (7–48) | 20.5 (3–46) | 19.5 (4–39) |
| Participated at 3-mo follow-up, no. (%) | 286 (98) | 238 (92) | 192 (94) |
| Participated at 15-mo follow-up, no. (%) | 277 (95) | 247 (96) | 197 (96) |
| Mean age, y (SD) | 17.8 (1.2) | 17.6 (1.4) | 17.6 (1.5) |
| Religion,a no. (%) | |||
| Muslim | 52 (18) | 37 (14) | 24 (12) |
| Catholic | 21 (7) | 21 (8) | 18 (9) |
| Spiritual, Pentecostal, or Charismatic | 128 (44) | 120 (47) | 93 (45) |
| Protestant | 61 (21) | 61 (24) | 54 (26) |
| Other | 26 (9) | 14 (5) | 12 (6) |
| Mother’s education,b no. (%) | |||
| Don’t know | 72 (25) | 56 (22) | 47 (23) |
| < secondary | 47 (16) | 46 (18) | 22 (11) |
| ≥ secondary | 170 (58) | 154 (60) | 135 (66) |
| Father’s education,c no. (%) | |||
| Don’t know | 65 (22) | 42 (16) | 41 (20) |
| < secondary | 119 (41) | 109 (42) | 77 (38) |
| ≥ secondary | 105 (36) | 106 (41) | 86 (42) |
| Ethnicity,d no. (%) | |||
| Akan | 112 (38) | 113 (44) | 70 (34) |
| Ga | 86 (29) | 61 (24) | 68 (33) |
| Ewe | 42 (14) | 49 (19) | 39 (19) |
| Other | 41 (14) | 23 (9) | 25 (12) |
| Own phone,e no. (%) | |||
| Yes | 247 (84) | 219 (85) | 177 (86) |
| No, but have access | 38 (13) | 29 (11) | 24 (12) |
| No, no access | 2 (1) | 5 (2) | 3 (1) |
| Baseline knowledge score, mean (SD) | 0.26 (0.16) | 0.30 (0.17) | 0.31 (0.18) |
a
Data missing for 5 control, 5 unidirectional, and 4 interactive participants.
b
Data missing for 4 control, 2 unidirectional, and 1 interactive participants.
c
Data missing for 4 control, 1 unidirectional, and 1 interactive participants.
d
Data missing for 12 control, 12 unidirectional, and 3 interactive participants.
e
Data missing (although phone number was provided by all) for 6 control, 5 unidirectional, and 1 interactive participants.