Table 2 Patient characteristics in relation to self-reported milk production of the first child
Table 2 | All patients | Nulliparous | Milk production of first child -Almost no milk | Milk production of first child -Insufficient | Milk production of first child -Adequate | Milk production of first child -Excessive | Ptrend |
|---|---|---|---|---|---|---|---|
n=592 | n=89 | n=25 | n=129 | n=245 | n=79 | ||
n (percent) | n (percent) | n (percent) | n (percent) | n (percent) | n (percent) | ||
Year of birth | |||||||
1903-1940 | 171 (28.9%) | 24 (27.0%) | 7 (28.0%) | 35 (27.1%) | 76 (31.0%) | 21 (26.6%) | 0.16 |
1941-1954 | 286 (48.3%) | 47 (52.8%) | 16 (64.0%) | 69 (53.5%) | 109 (44.5%) | 34 (43.0%) | |
1955+ | 135 (22.8%) | 18 (20.2%) | 2 (8.0%) | 25 (19.4%) | 60 (24.5%) | 24 (30.4%) | |
Age at diagnosis (years) | |||||||
<50 | 120 (20.3%) | 17 (19.1%) | 1 (4.0%) | 22 (17.1%) | 52 (21.2%) | 23 (29.1%) | 0.004 |
≥50 | 472 (79.7%) | 72 (80.9%) | 24 (96.0%) | 107 (82.9%) | 193 (78.8%) | 56 (70.9%) | |
Body Mass Index (BMI), (kg/m-2) | |||||||
<25 | 312 (53.0%) | 51 (57.3%) | 8 (32.0%) | 62 (48.4%) | 138 (56.3%) | 41 (53.2%) | 0.074 |
≥25-<30 | 185 (30.9%) | 22 (24.7%) | 8 (32.0%) | 51 (39.8%) | 68 (27.8%) | 25 (32.5%) | |
≥30 | 95 (16.1%) | 16 (18.0%) | 9 (36.0%) | 15 (11.7%) | 39 (15.9%) | 11 (14.3%) | |
Missing | 3 | 0 | 0 | 1 | 0 | 2 | |
Waist-Hip-Ratio (WHR) | |||||||
≤0,85 | 340 (57.6%) | 51 (58.0%) | 12 (48.0%) | 75 (58.1%) | 146 (59.8%) | 43 (54.4%) | 0.82 |
>0,85 | 250 (42.4%) | 37 (42.0%) | 13 (53.0%) | 54 (41.9%) | 98 (40.2%) | 36 (45.6%) | |
Missing | 2 | 1 | 0 | 0 | 1 | 0 | |
Breast volume (ml) | |||||||
<850 | 219 (37.0%) | 33 (37.1%) | 6 (24.0%) | 54 (41.9%) | 97 (39.6%) | 20 (25.3%) | 0.19 |
≥850 | 292 (49.3%) | 40 (44.9%) | 15 (60.0%) | 58 (45.0%) | 116 (47.3%) | 50 (63.3%) | |
Missing* | 81 | 16 | 4 | 17 | 32 | 9 | |
Current smoking | 0.19 | ||||||
Yes | 130 (22%) | 24 (27.0%) | 9 (36.0%) | 27 (20.9%) | 44 (18.0%) | 16 (20.3%) | |
No | 462 (78%) | 65 (73.0%) | 16 (64.0%) | 102 (79.1%) | 201 (82.0%) | 63 (79.7%) | |
Missing | 0 | 0 | 0 | 0 | 0 | 0 | |
Parity | |||||||
0 | 89 (15.0%) | 89 (100%) | 0 | 0 | 0 | 0 | 0.43 |
1 | 91 (15.4%) | 3 (12.0%) | 22 (17.1%) | 47 (19.2%) | 15 (19.0%) | ||
2 | 253 (42.7%) | 14 (56.0%) | 64 (49.6%) | 125 (51.0%) | 40 (50.6%) | ||
3+ | 159 (26.9%) | 8 (32.0%) | 43 (33.3%) | 73 (29.8%) | 24 (30.4%) | ||
Missing | 0 | 0 | 0 | 0 | 0 | 0 | |
Age at first birth, years** | |||||||
<20 | 62 (12.4%) | 5 (20.0%) | 16 (12.4%) | 26 (10.7%) | 10 (12.7%) | 0.09 | |
20-24 | 187 (37.4%) | 8 (32.0%) | 59 (45.7%) | 73 (30.0%) | 35 (44.3%) | ||
25-29 | 175 (35.0%) | 11 (44.0%) | 44 (34.1%) | 93 (38.3%) | 23 (29.1%) | ||
30+ | 76 (15.2%) | 1 (4.0%) | 10 (7.8%) | 51 (21.0%) | 11 (13.9%) | ||
Missing | 3 | 0 | 0 | 2 | 0 | ||
Breastfeeding duration of first child** | |||||||
Breastfeeding duration of first child, ≤ 12 months | 476 (96.0%) | 24 (100%) | 128 (100%) | 229 (94.6%) | 72 (91.1%) | 0.001 | |
Breastfeeding duration of first child, > 12 months | 20 (4%) | 0 (%) | 0 (%) | 13 (5.4%) | 7 (8.9%) | ||
Missing | 7 | 1 | 1 | 3 | 0 |