Table 4.

Sleep Parameters between Polysomnography and Actigraphy

	JIA	Asthma	Controls
	n = 34	n = 19	n = 18
Total Sleep Time(mins)
Polysomnography	485 ± 48.9	479 ± 66.9	468 ± 75.1
Actigraphy
Low threshold	512 ± 39.0	481 ± 66.3	482 ± 68.7
Medium threshold a	496 ± 37.9	457 ± 66.2	462 ± 68.9
High threshold b	474 ± 37.0	428 ± 65.0	435 ± 72.3
Sleep Efficiency, %
Polysomnography	84 ± 8.9	81 ± 10.1	82 ± 8.4
Actigraphy
Low threshold c	89 ± 5.2	81 ± 9.3	84 ± 7.5
Medium threshold d	86 ± 5.7	77 ± 9.9	80 ± 8.1
High threshold e	82 ± 6.3	72 ± 9.9	75 ± 8.9
Wake After Sleep Onset, %
Polysomnography	11.3 ± 8.6	16.2 ± 10.3	14.0 ± 6.0
Actigraphy
Low threshold f	5.0 ± 3.2	12.1 ± 8.1	9.8 ± 3.1
Medium threshold g	8.0 ± 4.3	16.5 ± 9.0	13.7 ± 4.3
High threshold h	12.1 ± 5.5	21.8 ± 9.2	18.8 ± 5.6

Data are mean ± SD. All p = Pair wise comparison, Tukey HSD

^ap= .05 JIA vs. asthma

^bBoth p<.04 JIA vs. asthma, JIA vs. control

^cp<.001 JIA vs. asthma

^dp<.001 JIA vs. asthma; p<.04, JIA vs. control

^ep<.001 JIA vs. asthma; p<.02 JIA vs. control

^fp<.001 JIA vs. asthma; p = .007 JIA vs. control

^gp<.001 JIA vs. asthma; p = .005 JIA vs. control

^hp<.001 JIA vs. asthma; p =.003 JIA vs. control