Table 2.

Relationships between the crying measures at 5–6 weeks and night waking at 12 weeks of age

	COSI			CCS
			N			N
1. Spearman’s correlations between total minutes of fuss/crying per 24 h at 5–6 weeks and no. nights infants slept ≥5 h at 12 weeks of age.	r=−0.142	p=0.013*	305	r=0.046	p=0.537	181
2. Mann–Whitney comparison of infants with fuss/crying total (a) ≥3 h/24 h (b) <3 h/24 h at 5–6 weeks on mean (SD) no. nights infants slept ≥5 h at 12 weeks of age.	4.71 (2.90) nights 5.25 (2.33) nights	U=4778.5 p=0.533	38 267	5.44 (2.23) nights 4.31 (2.58) nights	U=1114.0 p=0.086	18 163
3. Mann–Whitney comparison of infants with (a) unsoothable cry bouts (b) no unsoothable cry bouts at 5–6 weeks on mean (SD) no. nights infants slept ≥5 h at 12 weeks of age.	NA	NA	NA	4.26 (2.53) nights 4.53 (2.58) nights	U=3583.5 p=0.311	72 109

^*p<0.05.

CCS, cross-cultural study.