Table 2.

Frequency, onset, and severity of arthritis

	Frequency of disease	Mean day of onset†	Mean max score‡
Group 1
DBA/1	8/9	38  (25–51)	9.9  (2, 1)
DR4/huCD4 tg	7/8	47  (39–51)	11.3  (0, 4)
Non tg	0/13	—	—
Group 2
DBA/1	9/11	45  (21–51)	7.4  (2, 0)
DR4/huCD4 tg	8/14	46  (27–54)	9.7  (2, 5)
Non tg	0/15	—	—

^†Includes all mice with clinical arthritis. Range of day of onset is given in parentheses. 

^‡Mice sacrificed for photography or histopathology during the experiment are not included. The standard deviation is given in parentheses. Tg, transgenic.