Table 3.

Multivariable adjusted^* association between trajectory groups and gestational age at delivery, n=245.^†

Trajectory Group	n	Gestational Age at Delivery (weeks) β(95% Confidence Interval)
		Daily dose
Group 1	12	-2.3 (-3.4, -1.3)
Group 2	50	-0.6 (-1.3, 0.0)
Group 3	88	Reference
Group 4	95	0.3 (-0.2, 0.8)
Cumulative dose
Group 1	11	-2.6 (-3.6, -1.5)
Group 2	43	-0.5 (-1.2, 0.1)
Group 3	94	-0.4 (-0.9, 0.1)
Group 4	97	Reference

^*Adjusted for gestational age at enrollment, maternal age, race and ethnicity, socio-economic status, pre-pregnancy overweight/obesity, Health Assesment Questionnaire score at enrollment, any use of each of the medications during the first 32 gestational weeks: biologic disease modifying antirheumatic drug, non-biologic disease modifying antirheumatic drug, nonsteroidal anti-inflammatory drug, and multiple gestation.

^†Excluding 3 women with missing covariate values.