Biostatistical Assessment of Mutagenicity Studies: A Stepwise Confidence Procedure

Table 3

Number of micronuclei per animal and 2000 scored cells for the negative control, four doses of hydroquinone and positive control cyclophosphamide.

Experimental group	Mean	Standard deviation	Sample size
Vehicle control	2.57	1.27	7
Hydro30	3.80	1.10	5
Hydro50	6.30	1.48	5
Hydro75	14.0	3.97	5
Hyro100	20.0	4.06	5
Positive control	25	8.91	4