Table A1.

Number of pre-existing abrasions per child with a comparison of the probability of acquiring a new abrasion during one hour of play.

Number of Pre-Existing Abrasions Before 1 Hour of Play	Percentage of Children Who Acquired New Abrasions During 1 Hour of Play (%)	Ratio of Children Who Acquired New Abrasions During 1 Hour of Play	Confidence Interval
0	5.8%	3/52	0.012 to 0.162
1	5.7%	3/37	0.007 to 0.182
2	5.3%	1/18	0.001 to 0.273
3	30.0%	3/10	0.067 to 0.653
4	33.3%	1/3	0.008 to 0.906
5	0	0/2	N/A a
6	0	0/0	N/A
7	0	0/0	N/A
8	0	0/0	N/A
9	0	0/1	N/A

^a N/A = not applicable.