Table 3.

School-night and weekend-night actigraphy data, by school SES and child ethnicity.

	School Nights				Weekend Nights
Actigraphy	Low-SES Schools		High-SES Schools		Low-SES Schools		High-SES Schools
	Māori (n = 18)	NZE (n = 17)	Māori (n = 18)	NZE (n = 17)	Māori (n = 15)	NZE (n = 15)	Māori (n = 17)	NZE (n = 17)
Sleep onset, 24-hour clock	21:16 ± 0:45	20:51 ± 0:37	20:31 ± 0:34	20:30 ± 0:38	21:57 ± 0:48	21:52 ± 0:48	21:29 ± 0:58	21:17 ± 0:54
Sleep end time, 24-hour clock	7:15 ± 0:33	6:54 ± 0:30	6:40 ± 0:27	6:30 ± 0:38	7:26 ± 0:52	7:14 ± 0:58	7:07 ± 0:55	6:49 ± 0:40
Sleep period, hours:minutes	9:58 ± 0:30	9:57 ± 0:31	10:04 ± 0:25	9:55 ± 0:30	9:14 ± 0:46	9:18 ± 0:33	9:37 ± 0:55	9:23 ± 0:46
Sleep period efficiency, %	76.42 ± 5.65	78.34 ± 4.67	80.87 ± 5.86	80.38 ± 6.21	76.30 ± 3.85	81.40 ± 6.07	81.84 ± 5.16	82.64 ± 6.16

Values are means ± SDs. NZE = New Zealand European; SES = socioeconomic status.