Skip to main content

Table 1 Descriptive statistics for breastfeeding outcomes in the cohort

From: Factors associated with duration of breastfeeding in women giving birth for the first time

Variable Overall
N = 5249
Did you ever breastfeed this baby?
N = 5249
How old was this baby when all breastfeeding stopped?
N = 4704 (8 missing)
How old was this baby when exclusive breastfeeding stopped?
N = 3726 (1 missing)
Yes
N = 4712
No
N = 537
P* > 6 m
N = 2739
<=6 m
N = 1965
P* > 6 m
N = 1161
<=6 m
N = 2565
P*
Age, mean (SD) 27.6 (5.4) 27.9 (5.) 24.9 (6.0) < 0.001 28.8 (4.8) 26.6 (5.6) < 0.001 28.8 (4.7) 27.6 (5.3) < 0.001
BMI, mean (SD) 26.2 (6.2) 25.9 (5.9) 29.2 (8.3) < 0.001 25.1 (5.1) 26.9 (6.6) < 0.001 25.0 (4.9) 25.8 (6.0) < 0.001
Race or Ethnicity     < 0.001    < 0.001    0.32
 Non-Hispanic white 3551 (67.7%) 3270 (69.4%) 281 (52.3%)   2073 (75.7%) 1192 (60.7%)   856 (73.7%) 1835 (71.5%)  
 Non-Hispanic black 524 (10.0%) 377 (8.0%) 147 (27.4%)   149 (5.4%) 226 (11.5%)   75 (6.5%) 203 (7.9%)  
 Hispanic 733(14.0%) 657 (13.9%) 76 (14.2%)   275 (10.0%) 382 (19.4%)   130 (11.2%) 312 (12.2%)  
 Other 441 (8.4%) 408 (8.7%) 33 (6.2%)   242 (8.8%) 165 (8.4%)   100 (8.6%) 215 (8.4%)  
Poverty     < 0.001    < 0.001    < 0.001
 > 200% of FPL 3317 (63.2%) 3136 (66.6%) 181 (33.7%)   2065 (75.4%) 1068 (54.4%)   867 (74.7%) 1697 (66.2%)  
 100–200% of FPL 613 (11.7%) 546 (11.6%) 67 (12.5%)   291 (10.6%) 255 (13.0%)   134 (11.5%) 281 (11.0%)  
 < 100% of FPL 550 (10.5%) 439 (9.3%) 111 (20.8%)   197 (7.2%) 241 (12.3%)   75 (6.5%) 259 (10.1%)  
 Refused 769 (14.7%) 591 (12.5%) 170 (33.2%)   186 (6.8%) 401 (20.4%)   85 (7.3%) 328 (12.8%)  
Education     < 0.001    < 0.001    < 0.001
 High school or less 168 (32.1%) 1336 (28.4%) 351 (65.4%)   522 (19.1%) 808 (41.1%)   239 (20.6%) 743 (29.0%)  
 Bachelor’s degree or less 2167 (41.3%) 2035 (43.2%) 132 (24.6%)   1256 (45.9%) 779 (39.6%)   521 (44.9%) 1102 (43.0%)  
 Master’s degree and higher 1395 (26.6%) 1341 (28.5%) 54 (10.1%)   961 (35.1%) 378 (19.2%)   401 (34.5%) 720 (28.1%)  
Was this pregnancy planned, yes 3410 (65.0%) 3188 (67.7%) 222 (41.3%) < 0.001 2106 (76.9%) 1078 (54.9%) < 0.001 882 (76.0%) 1723 (67.2%) < 0.001
Was this delivery by Cesarean, yes 1418 (27.0%) 1251 (26.6%) 167 (31.1%) 0.02 683 (24.9%) 566 (28.8%) 0.003 298 (25.7%) 620 (24.2%) 0.33
Did you smoke any tobacco products in the month before delivery? yes 143 (2.7%) 87 (1.9%) 56 (10.4%) < 0.001 20 (0.7%) 66 (3.4%) < 0.001 7 (0.6%) 70 (2.7%) < 0.001
Gestational age at the time of delivery, mean (SD) 38.9 (2.0) 39.0 (2.0) 38.4 (2.5) < 0.001 39.1 (1.8%) 38.8 (2.2%) < 0.001 39.1 (1.5) 39.0 (2.2) 0.53
Mental health disorder, yes 1164 (22.2%) 1031 (21.9%) 133 (24.8%) 0.13 574 (21.0%) 454 (23.1%) 0.08 244 (21.0%) 572 (22.3%) 0.38
Depression, yes 750 (14.3%) 671 (14.2%) 79 (14.7%) 0.77 378 (13.8%) 292 (14.9%) 0.31 165 (14.2%) 353 (13.8%) 0.71
Bipolar, yes 79 (1.5%) 58 (1.2%) 21 (3.9%) < 0.001 17 (0.6%) 40 (2.0%) < 0.001 9 (0.8%) 40 (1.6%) 0.05
Anxiety, yes 593 (11.3%) 544 (11.5%) 49 (9.1%) 0.09 302 (11.0%) 241 (12.3%) 0.19 116 (10.0%) 311 (12.1%) 0.06
  1. m months, BMI body mass index, FPL federal poverty level
  2. *P-values obtained from t-test or chi-square test