Table 1.
Baseline characteristics
| No SMS notification for questionnaires + voucher at 24-month visit (n = 350) |
SMS notification for questionnaires + voucher at 24-month visit (n = 345) |
No SMS notification for questionnaires + voucher before 24-month visit (n = 352) |
SMS notification for questionnaires + voucher before 24-month visit (n = 347) |
|
|---|---|---|---|---|
| Host trial allocation | ||||
| Control | 173 (49%) | 175 (51%) | 177 (50%) | 176 (51%) |
| Intervention | 177 (51%) | 170 (49%) | 175 (50%) | 171 (49%) |
| Number of first-degree relatives with atopic diseasea | ||||
| 1 | 128 (37%) | 125 (36%) | 131 (37%) | 123 (35%) |
| 2 | 139 (40%) | 167 (48%) | 141 (40%) | 149 (43%) |
| 3 or more | 83 (24%) | 53 (15%) | 80 (23%) | 75 (22%) |
| Age of mother: mean [SD] | 32.0 [5.0] | 31.5 [5.3] | 31.3 [5.3] | 31.7 [5.4] |
| Number of other children in household | ||||
| 0 | 133 (38%) | 148 (43%) | 146 (41%) | 141 (41%) |
| 1 | 150 (43%) | 135 (39%) | 141 (40%) | 131 (38%) |
| 2 | 49 (14%) | 37 (11%) | 53 (15%) | 52 (15%) |
| 3 or more | 18 (5%) | 25 (7%) | 12 (3%) | 23 (7%) |
| Decile of English Index of Multiple Deprivation 2015 | ||||
| Median [25th, 75th centiles] | 6 [4, 9] | 6 [3, 9] | 6 [3, 9] | 5 [3, 8] |
| n | 343 | 338 | 347 | 340 |
Data shown are n (%) using the number randomised to each group as the denominator unless otherwise specified
SD standard deviation, SMS short message service
aHost trial stratification variable