Table 1.
Description of the Study Populations of Children Included in the Meta-Analyses (n=30,002)
| Author | Year | Country | Sample size (n) | Age (years) |
|---|---|---|---|---|
| Locard w1 | 1992 | France | 1,031 | 5 |
| Ben Slama w2 * | 2002 | Tunisia | 167 | 6–10 |
| Sekine w3 | 2002 | Japan | 8,941 | 2–4 |
| Von Kries w4 | 2002 | Germany | 6,645 | 5–6 |
| Agras w5 | 2004 | USA | 150 | 9.5 |
| (sleep at 3–5) | ||||
| Giugliano w6 | 2004 | Brazil | 165 | 6–10 |
| Padez w7 | 2005 | Portugal | 4,390 | 7–9 |
| Reilly w8 | 2005 | UK | 6,426 | 7 |
| (sleep at 2.5) | ||||
| Chaput (1) w9 | 2006 | Canada | 422 | 5–10 |
| Chen w10 † # | 2006 | Taiwan | 656 | 13–18 |
| Seicean w11 § # | 2007 | USA | 509 | 14–18 |
| Yu (males) w12 ¶ | 2007 | China | 273 | 10–20 |
| Yu (females) w12 ¶ | 2007 | China | 227 | 10–20 |
Short sleep: * <8 h per day; † <6 h per night or <3 h weekday per week; § <5 h on school nights; ¶ average week night sleep in hours # overweight/obesity defined as >85th percentile
Note: All references beginning with a W are available in the website version of this paper on the SLEEP website at www.journalsleep.org