Temporal trends and recent correlates in sedentary behaviours in Chinese children

Table 2 Median daily hours for screen time, home work and extracurricular reading, writing and drawing among Chinese youth by sex and age from 1997 to 2006^§

	Urban				Rural
	1997	2000	2004	2006	1997	2000	2004	2006
Screen time (hrs/d) ^†
Boys aged 6-12 yrs***	0.9	0.6	1.3	1.3	0.7	0.7	1.3	1.7
Boys aged 13-18 yrs***	0.5	0.5	1.4	1.7	0.4	0.4	1.0	1.3
Girls aged 6-12 yrs***	0.9	0.6	1.3	1.2	0.7	0.7	1.3	1.6
Girls aged 13-18 yrs***	0.5	0.5	1.2	1.3	0.3	0.4	1.0	1.1
Homework (hrs/d)
Boys aged 6-12 yrs	-	0.6**	1.0	0.9	-	0.6***	1.0	1.0
Boys aged 13-18 yrs***	-	0.7	1.5	1.7	-	0.8	1.0	1.2
Girls aged 6-12 yrs***	-	0.7	1.2	1.2	-	0.6	1.0	1.0
Girls aged 13-18 yrs***	-	0.9	1.6	1.9	-	0.9	1.5	1.3
Extracurricular reading, writing and drawing						-
Boys aged 6-12 yrs	-	0.1***	0.4	0.5	-	0.1**	0.2	0.3
Boys aged 13-18 yrs***	-	0.1	0.5	0.4	-	0.1	0.4	0.4
Girls aged 6-12 yrs	-	0.3*	0.5	0.5	-	0.1	0.0	0.3
Girls aged 13-18 yrs***	-	0.2	0.5	0.5	-	0.1	0.6	0.5

^§ The NPAR1WAY Procedure was used to examine the difference between survey years.
^† Screen time denotes time on watching TV, videotapes in 1997 and 2000, and on TV, videotapes, VCDs, DVDs, video games, computer usage in 2004 and 2006.
*P < 0.01. **P < 0.001. ***P < 0.0001.

ISSN: 1479-5868