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Table 1 Characteristics of children and their mothers

From: Eczema phenotypes and risk of allergic and respiratory conditions in school age children

 Subjects
n = 4277
Maternal characteristics
 Age at enrollment, years mean (SD)31.7 (4.5)
 Parity, nulliparous  % (n)59 (2526)
 Maternal education, higher  % (n)59 (2510)
 History of eczema, allergy and asthma, yes  % (n)61 (2597)
Child characteristics
 Sex, female  % (n)51 (2181)
 Gestational age at birth, weeks median (2.5–97.5th percentile)a40.1 (35.5–42.3)
 Birth weight, grams mean (SD)a3443.1 (566.9)
 Ethnicity, non-European  % (n)24 (1006)
 Breastfeeding, ever  % (n)93 (3961)
 Eczema, ever  % (n)a23 (859)
Eczema phenotypes  % (n)
 Never76 (3229)
 Early transient9 (363)
 Mid-transient6 (259)
 Late transient8 (333)
 Persistent2 (93)
Current asthma, yes  % (n)b5 (203)
Inhalant sensitization, yes  % (n)b32 (985)
Food sensitization, yes  % (n)b7 (209)
Physician diagnosed inhalant allergy, yes  % (n)b12 (447)
Allergic rhinitis, yes  % (n)a20.6 (734)
Physician diagnosed food allergy, yes  % (n)b2 (79)
Lung function, Z-scores mean (SD)a
 FVC0.18 (0.91)
 FEV10.13 (0.96)
 FEV1/FVC− 0.12 (0.95)
 FEF75− 0.00 (0.91)
  1. Values are percentages (absolute values), mean (SD) or median (2.5–97.5th percentile) after imputation. aData was missing and not imputed for gestational age at birth (0.2%), birth weight (0.1%), ever eczema (11.6%), allergic rhinitis (26.9%), and lung function (11.5%). bData on the following outcomes were not imputed for the individual analysis and were missing for: current asthma (9.7%), inhalant (26.9%) and food sensitization (27.1%), physician diagnosed inhalant (10.9%) and food allergy (12.7%). They were imputed for the combined outcome analysis and values are for current asthma (yes) 6% (n = 237), inhalant sensitization (yes) 33% (n = 1394), food sensitization (yes) 8% (n = 336), physician-diagnosed inhalant allergy (yes) 12% (n = 521) and physician-diagnosed food allergy (yes) 3% (n = 105)