All children | Co-sleeping at age 1 yr | Sleep less when older | ||||
n | % | % | p-value | % | p-value | |
Frequent awakenings age 1 yr | ||||||
Yes | 940 | 39.2 | 40.3 | <0.0001 | 11.7 | 0.005 |
No | 1458 | 24.8 | 7.4 | |||
Frequent awakenings age 2 yrs | ||||||
Yes | 603 | 30.7 | 37.4 | <0.0001 | 10.7 | 0.060 |
No | 1359 | 26.7 | 7.6 | |||
Frequent awakenings age 3 yrs | ||||||
Yes | 615 | 27.7 | 34.8 | 0.009 | 12.1 | 0.008 |
No | 1604 | 28.9 | 7.7 | |||
Persistent nocturnal awakenings | ||||||
Yes | 327 | 13.6 | 41.6 | <0.0001 | 14.6 | 0.002 |
No | 2071 | 29.2 | 8.2 |