Table 1.

Gait parameters of mutagenized C57BL/6J mice at 23 cm/s.

	Males (n = 70)						Females (n = 59)
	Front			Rear			Front			Rear
	Mean ± SD	−95%	95%	Mean ± SD	−95%	95%	Mean ± SD	−95%	95%	Mean ± SD	−95%	95%
Stride (ms)
Right	289 ± 35	281	297	283 ± 24	277	289	273 ± 31	265	281	268 ± 25	262	275
Left	287 ± 32	279	294	283 ± 26	277	289	268 ± 35	259	277	273 ± 27	266	280
Stance (ms)
Right	172 ± 17	168	176	177 ± 14	174	180	162 ± 17	157	166	169 ± 15	165	173
Left	169 ± 15	166	173	178 ± 14	175	181	162 ± 15	158	166	171 ± 14	167	175
Swing (ms)
Right	117 ± 28	110	124	106 ± 18	102	110	111 ± 27	104	118	100 ± 15	96	104
Left	117 ± 26	110	123	105 ± 19	100	110	106 ± 27	99	113	102 ± 18	97	106
Stance/stride
Right	0.61 ± 0.04	0.60	0.62	0.63 ± 0.03	0.62	0.64	0.60 ± 0.05	0.59	0.61	0.63 ± 0.03	0.62	0.64
Left	0.60 ± 0.05	0.59	0.61	0.64 ± 0.03	0.63	0.64	0.61 ± 0.03	0.61	0.62	0.63 ± 0.03	0.62	0.64
Swing/stride
Right	0.39 ± 0.04	0.38	0.40	0.37 ± 0.03	0.36	0.38	0.39 ± 0.05	0.38	0.4	0.37 ± 0.03	0.36	0.38
Left	0.39 ± 0.04	0.38	0.40	0.36 ± 0.03	0.36	0.37	0.38 ± 0.04	0.37	0.39	0.37 ± 0.03	0.36	0.38

Mean, standard deviation, and the lower (−95%) and upper (+95%) limits of the P = 0.05 confidence intervals are shown. Mice were third-generation progeny of founder mice treated with ethyl-nitro sourea (ENU) to create random point mutations. All mice were recessive for a subset of the ENU-induced mutations in the founder with any specific mutation represented in approximately one in eight of the offspring. None had overt phenotypes at the time of testing. Note the slightly longer mean stride, stance, and swing times of the male mice.