Table 1 Baseline characteristics of infants and parents
Characteristics | Early Sleep Intervention group (N = 148) | Usual care group (N = 158) | P value |
|---|---|---|---|
Infants | |||
Age (month) | 4.04 (0.31) | 4.05 (0.26) | 0.907 |
Male | 81 (54.7) | 85 (53.4) | 0.704 |
Nighttime breast feeding | 111 (75.0) | 125 (79.1) | 0.392 |
Self-soothing ability | 50 (33.8) | 45 (28.5) | 0.316 |
Bed sharing | 96 (64.9) | 100 (63.3) | 0.774 |
Parents | |||
Mother | 129 (87.2) | 137 (86.7) | 0.906 |
Age (year) | 29.97 (7.30) | 28.51 (7.16) | 0.080 |
Educational year ≥ 12 years | 139 (93.9) | 147 (93.0) | 0.755 |
Family income (USD/month) | 696.23 (550.02) | 612.68 (515.21) | 0.511 |
House environment – quiet | 117 (79.1) | 123 (77.8) | 0.798 |
Number of persons per bedroom > 3 persons | 13 (8.8) | 22 (13.9) | 0.158 |
Parental depression score | 12.80 (3.25) | 12.84 (3.53) | 0.936 |