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. 2013 Apr 4;8(4):e60247. doi: 10.1371/journal.pone.0060247

Table 1. Population characteristics for the final asthma-pregnancy cohort.

Characteristic Subcategory N
Number of pregnancy outcomes 19,600
Distinct number of females 17,184
Type of pregnancy outcome Deliveries 14,141
Pregnancy losses 5,459
Mean age at pregnancy outcome(years: (SD)) All pregnancies 29.7 (6.6)
Deliveries 30.1 (6.1)
Pregnancy losses 28.8 (7.8)