Table 1 Sociodemographic, cognitive and sleep variables at 6 and 12 months
Sociodemographic variables, categorical | |||
N (%) | |||
Gender (girls/boys) | 166 (45.9) / 196 (54.1) | ||
Birth order (first/other) | 183 (52.1) / 168 (47.9) | ||
Maternal education level, pregnancy (primary/secondary/higher) | 81 (23.1) / 113 (32.2) / 157 (44.7) | ||
Sociodemographic variables, continuous | |||
Mean (SD) | Min | Max | |
Child’s age at 30 months of EF assessment, days | 917.13 (13.75) | 883.00 | 986.00 |
Gestational age at birth, weeks | 39.81 (1.52) | 31.86 | 42.43 |
Maternal age when baby born, years | 31.04 (4.28) | 19.00 | 42.00 |
Infant birth weight, kg | 3.57 (0.50) | 1.47 | 5.47 |
Infant birth height, cm | 50.62 (2.23) | 39.00 | 57.00 |
Number of siblings | 0.74 (0.87) | 0.00 | 5.00 |
Cognitive variables, at 30 months | |||
INTER-NDA Mean Cognitive Score | 3.57 (0.32) | 1.92 | 4.00 |
Snack Delay, total score | 27.91 (8.27) | 0.00 | 36.00 |
Spin the Pots, total score | 11.99 (3.53) | 3.00 | 16.00 |
Sleep variables at 6 months | |||
BISQ nighttime sleep duration, hours | 9.87 (1.17) | 1.00 | 12.00 |
BISQ daytime time sleep duration, hours | 3.82 (1.29) | 1.50 | 11.00 |
BISQ total sleep duration, hours | 13.66 (1.50) | 5.50 | 18.50 |
BISQ proportion daytime sleep, % | 27.48 (7.66) | 12.00 | 81.82 |
BISQ number of awakenings / night | 2.41 (1.60) | 0.00 | 11.00 |
BISQ time awake / night, hours | 0.44 (0.44) | 0.00 | 2.00 |
Sleep variables at 12 months | |||
BISQ nighttime sleep duration, hours | 10.26 (0.98) | 4.00 | 13.00 |
BISQ daytime time sleep duration, hours | 2.61 (1.17) | 1.00 | 11.00 |
BISQ total sleep duration, hours | 12.75 (1.02) | 7.00 | 16.00 |
BISQ proportion daytime sleep, % | 19.64 (5.40) | 8.00 | 38.00 |
BISQ number of awakenings / night | 1.85 (1.36) | 0.00 | 8.00 |
BISQ time awake / night, hours | 0.32 (0.52) | 0.00 | 5.00 |