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J Epidemiol Community Health 59:473-474 doi:10.1136/jech.2004.026518
  • Research report

Length of gestation is associated with mortality from cerebrovascular disease

Table 1

 Hazard ratios for death from ischaemic heart disease, cerebrovascular disease, and occlusive stroke (95% CI) in 11474 men and women born 1915–1929. Adjusted for age, period of birth, sex, and social characteristics (mother’s civil status and social group when the study subject was born, and subject’s own social group, education, marital status, and household car ownership from 1960 census)

Ischaemic heart disease Cerebrovascular disease Cerebrovascular disease: occlusive stroke
Number of events HR (95% CI) age, period, and sex adjusted HR (95% CI) fully adjusted Number of events HR (95% CI) age, period, and sex adjusted HR (95% CI) fully adjusted Number of events HR (95% CI) age, period, and sex adjusted HR (95% CI) fully adjusted
Total number of events 1960–2001 1211 355 127
Weight for gestational age (quintiles)
Lowest 259 1.0 1.0 68 1.0 1.0 22 1.0 1.0
2nd 242 0.83 (0.70,0.99) 0.84 (0.71,1.00) 84 1.06 (0.77,1.45) 1.08 (0.78,1.49) 29 1.09 (0.63,1.90) 1.12 (0.64,1.96)
3rd 260 0.87 (0.73,1.03) 0.92 (0.77,1.09) 75 0.91 (0.66,1.27) 0.95 (0.68,1.32) 30 1.09 (0.63,1.90) 1.16 (0.66,2.01)
4th 218 0.74 (0.62,0.89) 0.77 (0.65,0.93) 69 0.83 (0.60,1.17) 0.87 (0.62,1.21) 22 0.80 (0.44,1.45) 0.86 (0.47,1.55)
Highest 232 0.76 (0.63,0.90) 0.80 (0.67,0.96) 59 0.70 (0.50,1.00) 0.74 (0.52,1.05) 24 0.82 (0.46,1.48) 0.89 (0.50,1.61)
p value heterog 4 df 0.007 0.035 0.136 0.225 0.673 0.764
p value linear trend 0.001 0.010 0.015 0.035 0.266 0.421
Gestational age (weeks)
30–35 52 1.0 1.0 23 1.0 1.0 15 1.0 1.0
36–37 108 0.92 (0.66,1.28) 0.95 (0.68,1.32) 39 0.72 (0.43,1.20) 0.74 (0.44,1.25) 13 0.37 (0.18,0.78) 0.39 (0.18,0.82)
38–39 395 0.94 (0.70,1.26) 1.01 (0.75,1.35) 122 0.62 (0.40,0.97) 0.66 (0.42,1.03) 37 0.29 (0.16,0.53) 0.32 (0.17,0.58)
40–41 509 1.01 (0.76,1.35) 1.08 (0.81,1.44) 133 0.56 (0.36,0.88) 0.60 (0.38,0.94) 50 0.32 (0.18,0.58) 0.36 (0.20,0.65)
42+ 147 1.06 (0.77,1.45) 1.09 (0.80,1.50) 38 0.57 (0.34,0.96) 0.60 (0.35,0.99) 12 0.28 (0.13,0.59) 0.29 (0.14,0.63)
p value heterog 4 df 0.663 0.775 0.148 0.234 0.007 0.015
p value linear trend 0.227 0.160 0.021 0.031 0.009 0.016

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