Table 2.

Monthly antibody titers in the study population.

	n	All patients (n = 1081)	Women (n = 445)	Men (n = 636)	p-value
1st month	787	39.8 ± 19.7	40.7 ± 18.6	39.1 ± 20.5	0.275
2nd month	146	44.9 ± 19.1	43.9 ± 21.3	45.5 ± 17.6	0.651
3rd month	52	42.9 ± 19.8	34.2 ± 20.4	47.9 ± 17.9	0.014
4th month	19	31.7 ± 23.8	30.4 ± 16.8	31.9 ± 25.4	0.925
5th month	23	23.2 ± 19.8	12.6 ± 11.4	25.4 ± 20.7	0.250
6th month	13	16.8 ± 16.4	15.1 ± 18.6	18.3 ± 15.6	0.739
7th month	19	38.9 ± 23.9	38.8 ± 31.8	38.8 ± 21.1	0.997
8th month	17	38.4 ± 27.9	29.4 ± 47.4	40.3 ± 24.3	0.555
9th month	5	36.9 ± 22.6	35.6 ± 43.8	37.9 ± 7.9	0.927

Note: all titers are expressed as mean ± standard deviation cut-off index.