Suspected Lonely Mouse Syndrome as a Cage Effect in a Drug Safety Study

Table 3

Significant gender difference in motor activity of drug-free (control) animals.

Motor score:	Male (%)	Female (%)
NOA: number (%)	85 (70.8)	63 (52.5)
Rapid, darting: number (%)	13 (10.8)	36 (30.0)
Hunched, lethargic: number (%)	2 (1.7)	4 (3.3)
Hunched, motionless: number (%)	20 (16.7)	17 (14.2)

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