. Author manuscript; available in PMC: 2005 Sep 13.

Published in final edited form as: Behav Sleep Med. 2005;3(1):44–61. doi: 10.1207/s15402010bsm0301_6

TABLE 3.

Description of Sleep Variables at Follow Up

	2 Year		3 Year		4 Year
Variables	n	%	n	%	n	%	Significance^a
Current sleep problem (parent)	12	18	8	12	5	7	.10
Past sleep problem (parent; in last year)	16	24	12	18	16	24	ns
SO criterion 1 (> 20 min to fall asleep)	6	9	7	10	5	7	ns
SO criterion 2 (parental presence at sleep onset)	32	47	27	40	16	24	.0001
SO criterion 3 (> 1 reunion)	5	7	7	10	6	9	ns
SO protodysomnia only	6	9	6	9	2	3	ns
Night waking protodysomnia only	6	9	2	3	0	0	.004
Both	1	2	0	0	0	0	ns
Cosleeping reactive	11	16	7	10	7	10	ns
Cosleeping nonreactive	8	12	10	15	10	15	ns

Note. SO = Sleep Onset.

Cochran Q test was used to determine differences in the rate of problem sleep variables across the three follow-up assessments.