Table 2.
Demographic characteristics of participants.
| Characteristic | Category | All CHAT RCT Participants N = 947 |
Non-Interviewed Participants N = 913 |
Interviewed Participants N = 34 |
p-Value * |
|---|---|---|---|---|---|
| n (%) | n (%) | n (%) | |||
| Intervention arm | Telephone calls + Booklets | 293 (31) | 279 (30) | 14 (41) | 0.2249 |
| Text messages + Booklets | 338 (36) | 325 (36) | 13 (38) | ||
| Control (usual care) | 316 (33) | 309 (34) | 7 (21) | ||
| Parity | First-time mother | 515 (54) | 492 (54) | 23 (68) | 0.1138 |
| Not first-time mother | 432 (46) | 421 (46) | 11 (32) | ||
| Country of Birth | Australia | 361 (38) | 344 (38) | 17 (50) | 0.1464 |
| Other | 586 (62) | 569 (62) | 17 (50) | ||
| Aboriginal status | Non-Aboriginal | 925 (98) | 892 (98) | 33 (97) | 0.8077 |
| Aboriginal | 22 (2) | 21 (2) | 1 (3) | ||
| Language spoken at home | English | 525 (55) | 502 (55) | 23 (68) | 0.1446 |
| Other | 422 (45) | 411 (45) | 11 (32) | ||
| Age (years) | ≥30 | 661 (70) | 633 (69) | 28 (82) | 0.1044 |
| <30 | 286 (30) | 280 (31) | 6 (18) | ||
| Education | University | 642 (68) | 615 (67) | 27 (79) | 0.1398 |
| Other | 305 (32) | 298 (33) | 7 (21) | ||
| Household income | ≥AUS$80,000 | 551 (58) | 525 (58) | 26 (76) | 0.0885 |
| <AUS$80,000 | 301 (32) | 295 (32) | 6 (18) | ||
| Don’t know | 95 (10) | 93 (10) | 2 (6) | ||
| Employment status | Employed | 604 (64) | 577 (63) | 27 (79) | 0.0534 |
| Other | 343 (36) | 336 (37) | 7 (21) | ||
| Marital status | Married/de-facto partner | 887 (94) | 855 (94) | 32 (94) | 0.9192 |
| Other | 60 (6) | 58 (6) | 2 (6) |
* Chi-square test of independence was performed to examine the relation between characteristics of interviewed and non-interviewed participants.