Table 2.

Association between parity, age at first birth, and relative risk of death from non-Hodgkin’s lymphoma over a 32-year follow-up period.

Variables	Crude RR (95% CI)	Multivariate-Adjusted RR * (95% CI)
Age at recruitment (1st birth)
≤23	1.00	1.00
>23	1.45 (1.18–1.77)	1.41 (1.13–1.75)
Parity
1	1.00	1.00
2	0.70 (0.53–0.93)	0.74 (0.55–0.98)
3+	0.64 (0.49–0.85)	0.71 (0.53–0.95)
	p = 0.01 for linear trend	p = 0.05 for linear trend
Continuous	0.89 (0.83–0.96)	0.93 (0.87–0.99)
Marital status
Married	1.00	1.00
Not married	1.27 (0.73–2.21)	1.21 (0.70–2.12)
Years of schooling
≤9 years	1.00	1.00
>9 years	1.14 (0.94–1.38)	1.03 (0.84–1.27)
Birth place
Hospital/clinic	1.00	1.00
Home/other	1.31 (0.85–2.02)	1.46 (0.94–2.26)

* Mutually adjusted.