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Table 1 Selected characteristics of subjects contributing samples at 6 weeks (n = 158) and at 12 months of age (n = 282)

From: Associations between the gut microbiome and metabolome in early life

  6 weeks
(n = 158)
12 months
(n = 282)
Birthweight (grams)
 Mean (Standard Deviation) 3370 (480) 3430 (528)
 Median [Minimum, Maximum] 3430 [1910, 4710] 3450 [1320, 4660]
 Missing 2 (1.3%) 4 (1.4%)
Sex
 Male 85 (53.8%) 159 (56.4%)
 Female 73 (46.2%) 123 (43.6%)
Feeding Mode Until Time of Sample Collection
 Unknown 6 (3.8%) 7 (2.5%)
 Exclusively breastfed 98 (62%) 99 (35.1%)
 Exclusively formula fed 13 (8.2%) 9 (3.2%)
 Mixed 41 (25.9%) 167 (59.2%)
Delivery Mode
 Vaginal 114 (72.2%) 200 (70.9%)
 Cesarean 44 (27.8%) 82 (29.1%)
Gestational Age (Weeks)
 Mean (SD) 39.1 (1.59) 39.0 (1.70)
 Median [Minimum, Maximum] 39.1 [33.4, 43.0] 39.1 [29.1, 42.0]
Post-delivery infant systemic antibiotic exposure
 No 151 (95.6%) 274 (97.2%)
 Yes 7 (4.4%) 8 (2.8%)
Maternal smoking during pregnancy
 No 143 (90.5%) 262 (92.9%)
 Yes 11 (7.0%) 14 (5.0%)
 Missing 4 (2.5%) 6 (2.1%)
Infant Race
 Other 4 (2.5%) 13 (4.6%)
 White 154 (97.5%) 269 (95.4%)