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Table 2 Association between parity, age at first birth, and relative risk of death from brain cancer over a 32-year follow-up period

From: Parity, age at first birth, and risk of death from brain cancer: a population-based cohort study in Taiwan

Variables Crude HR (95%CI) Multivariate-Adjusted HR* (95% CI)
Age at recruitment (1st birth)
≤ 20 1.00 1.00
21-25 1.36 (0.92~2.01) 1.35 (0.91~2.01)
> 25 1.73 (1.16~2.58) 1.61 (1.05~2.45)
  p=0.0034 for linear trend p=0.0238 for linear trend
Parity   
1 1.00 1.00
2 0.71 (0.52~0.97) 0.73 (0.53~0.99)
3+ 0.56 (0.41~0.78) 0.60 (0.43~0.83)
  p=0.0005 for linear trend p =0.0034 for linear trend
Marital status   
Married 1.00 1.00
Not married 0.89 (0.42~1.88) 0.81 (0.38~1.73)
Years of schooling   
≤ 9 y 1.00 1.00
> 9y 1.07 (0.86~1.34) 0.93 (0.73~1.18)
Birth place   
Hospital / clinic 1.00 1.00
Home / other 1.03 (0.59~1.80) 1.16 (0.66~2.03)
  1. * mutually adjusted.