Table 2

Psychomotor performances (MLS variables) of the groups (means, SDs, medians, interquartile ranges)

	Exposed (n=154)				Controls (n=124)
Variables hand	Mean	SD	Median	Range	Mean	SD	Median	Range
Steadiness:
Number of errors:
Right	9.0	9.6	6.0	2.0–13.0	9.1	10.1	5.5	2.0–13.0
Left	11.0	12.9	8.0	3.0–14.2	11.4	11.9	7.0	3.0–17.7
Error time:
Right	0.8	2.2	0.4	0.1–0.9	0.7	1.0	0.3	0.1–0.8
Left	0.8	1.0	0.5	0.1–1.1	0.8	1.0	0.4	0.1–1.4
Line tracing:
Number of errors:
Right	21.2	9.0	20.0	16.0–25.0	20.6	7.5	19.5	16.0–26.7
Left	25.0	11.1	23.0	18.0–30.0	24.2	10.3	23.5	18.2–28.7
Error time:
Right	1.9	1.0	1.7	1.3–2.4	1.8	1.0	1.7	1.1–2.3
Left	2.4	1.3	2.2	1.6–3.0	2.3	1.2	2.1	1.4–3.0
Total time:
Right	22.5	9.2	21.2	16.4–26.8	22.7	9.7	21.2	15.9–28.0
Left	22.4	10.0	21.4	16.3–26.2	22.3	9.0	19.7	16.3–28.0
Aiming:
Number of errors:
Right	0.4	0.6	0.0	0.0–1.0	0.3	0.8	0.0	0.0–1.0
Left	1.1	1.5	1.0	0.0–2.0	1.3	2.1	0.0	0.0–2.0
Error time:
Right	1.5	2.7	0.0	0.0–2.0	1.3	4.1	0.0	0.0–1.0
Left	5.1	9.8	1.5	0.0–7.0	6.3	12.3	0.5	0.0–8.0
Total time:
Right	8.8	1.7	8.6	7.5–10.0	8.7	1.8	8.6	7.5–9.8
Left	9.1	1.8	8.8	7.9–10.2	9.0	1.9	8.8	7.6–9.9
Tapping:
Number of hits:
Right	207.4	22.6	206.0	192.5–222.0	206.2	22.5	204.5	191.0–214.7
Left	185.5	24.5	184.0	169.0–202.5	183.0	26.4	181.0	163.2–198.0
Peg board:
Total time:
Right	67.1	8.8	66.9	60.7–72.2	67.8	10.4	67.6	60.3–73.6
Left	67.2	8.7	66.6	60.4–72.3	67.9	10.2	67.9	60.4–73.2