Table 1.

Characteristics of Randomly Assigned Patients Who Received Vaccination (n = 117)

Characteristic	Id Vaccine (n = 76)		Control (n = 41)		P*
	No.	%	No.	%
Age at enrollment, years					.146
Mean	49.7		51.7
SD	9.7		9.1
Male sex	39	51.3	28	68.3	.083
White race	67	88.2	38	92.7	.537
ECOG performance status					.222
0	64	84.2	30	73.2
1	12	15.8	11	26.8
Histology					.845
FL, grade 1	34	44.7	17	41.5
FL, grade 2	42	55.3	24	58.5
IgM isotype	35	46.1	25	61.0
IgG isotype	40	52.6	15	36.6
IgM/IgG isotype	1	1.3	1	2.4
Stage					.263
II	2	2.6	1†	2.4
III	29	38.2	10‡	24.4
IV	45	59.2	30§	73.2
International Prognostic Index					1.000
Low or low intermediate (0-2)	69	90.8	37	90.2
High intermediate or high (3-5)	7	9.2	4	9.8
≤ Eight induction chemotherapy cycles	38	50.0	22	53.7	.846

Abbreviations: ECOG, Eastern Cooperative Oncology Group; FL, follicular lymphoma; Id, hybridoma-derived autologous tumor Ig idiotype; Ig, immunoglobulin; SD, standard deviation.

^*Comparisons between age groups were performed with nonparametric t-tests using normal approximation (two-sided Wilcoxon test). Comparisons between groups for remaining variables were performed using two-sided Fisher exact test.

^†P = 1.000 for comparison for stage II representation between two arms.

^‡P = .154 for comparison for stage III representation between two arms.

^§P = .160 for comparison for stage IV representation between two arms.