Department of Nutrition Science, Faculty of Health Science, Universitas Muhammadiyah Surakarta, Surakarta, Indonesia
Copyright © 2022 The Korean Society for Preventive Medicine
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
CONFLICT OF INTEREST
The authors have no conflicts of interest associated with the material presented in this paper.
FUNDING
This work was financially supported by Universitas Muhammadiyah Surakarta (grant No. 333.4/A.3-III/FIK/1/2021).
AUTHOR CONTRIBUTIONS
Conceptualization: Nurokhmah S, Rahmawaty S. Data curation: Nurokhmah S. Formal analysis: Nurokhmah S. Funding acquisition: Nurokhmah S, Rahmawaty S, Puspitasari DI. Methodology: Nurokhmah S, Rahmawaty S. Project administration: Puspitasari DI. Visualization: Nurokhmah S. Writing – original draft: Nurokhmah S. Writing – review & editing: Nurokhmah S, Rahmawaty S, Puspitasari DI.
Characteristics | EIBF (n=6722) | EBF (n=1629) | CBF-1 (n=1174) | CBF-2 (n=1015) |
---|---|---|---|---|
Bio-demographic variables | ||||
Infant’s age, mean±SD (mo) | 11.6±6.7 | 2.8±1.6 | 13.6±1.1 | 21.0±1.1 |
Sex of the infant | ||||
Male | 3504 (51.7) | 800 (50.3) | 610 (49.7) | 532 (51.9) |
Female | 3218 (48.3) | 829 (49.7) | 564 (50.3) | 503 (48.1) |
Mother’s age at delivery (y) | ||||
≤19 | 626 (9.0) | 161 (9.8) | 120 (9.8) | 80 (7.8) |
20–34 | 4947 (73.7) | 1221 (75.4) | 860 (73.2) | 763 (73.9) |
≥35 | 1149 (17.2) | 247 (14.8) | 193 (17.0) | 192 (18.3) |
Perceived birth size | ||||
Small | 884 (11.8) | 204 (11.4) | 159 (11.3) | 146 (12.5) |
Average | 3620 (57.2) | 888 (56.3) | 616 (58.1) | 556 (59.2) |
Large | 2218 (31.0) | 537 (32.2) | 399 (30.7) | 333 (28.3) |
Birth pattern | ||||
First child | 2161 (33.0) | 504 (31.0) | 398 (34.9) | 330 (33.1) |
Not first-child, birth interval <2 y | 460 (5.6) | 127 (6.9) | 78 (5.6) | 55 (4.5) |
Not first-child, birth interval ≥2 y | 4101 (61.4) | 998 (62.1) | 698 (59.4) | 650 (62.4) |
Place of residence | ||||
Urban | 3326 (49.1) | 758 (47.1) | 591 (49.5) | 524 (50.2) |
Rural | 3396 (50.9) | 871 (52.9) | 583 (50.5) | 511 (49.8) |
|
||||
Socioeconomic variables | ||||
Mother’s education | ||||
Primary or no formal education | 1557 (23.8) | 382 (24.0) | 284 (25.2) | 227 (22.5) |
Secondary | 3835 (59.3) | 939 (60.0) | 650 (57.5) | 592 (59.5) |
College or higher | 1330 (16.9) | 308 (15.9) | 240 (17.2) | 216 (18.0) |
Mother’s occupation | ||||
Not working | 3599 (55.9) | 941 (58.8) | 655 (59.4) | 517 (52.4) |
Agriculture | 550 (6.8) | 111 (5.6) | 97 (7.0) | 85 (8.1) |
Others1 | 2573 (37.3) | 577 (35.6) | 422 (33.6) | 433 (39.5) |
Household wealth index | ||||
Poor | 2689 (33.3) | 686 (34.3) | 469 (34.6) | 400 (32.5) |
Middle | 2069 (33.3) | 506 (35.0) | 361 (32.1) | 299 (30.7) |
Rich | 1964 (33.3) | 437 (30.7) | 344 (33.3) | 336 (36.8) |
|
||||
Behavioral characteristics | ||||
Mother’s smoking status | ||||
Yes | 127 (1.4) | 23 (1.2) | 20 (0.9) | 24 (2.2) |
No | 6595 (98.6) | 1606 (98.8) | 1154 (99.1) | 1011 (97.8) |
Antenatal care visits (times) | ||||
None | 186 (2.3) | 48 (2.8) | 37 (2.7) | 23 (1.7) |
1–3 | 592 (7.0) | 174 (8.9) | 101 (6.4) | 80 (5.8) |
≥4 | 5944 (90.6) | 1407 (88.3) | 1036 (90.9) | 932 (92.5) |
Cesarean delivery | ||||
Yes | 1230 (18.9) | 288 (18.1) | 206 (18.2) | 194 (19.1) |
No | 5492 (81.1) | 1341 (81.9) | 968 (81.8) | 841 (80.9) |
Place of delivery | ||||
Health facility | 5313 (84.1) | 1311 (85.5) | 925 (84.3) | 814 (83.5) |
Non-health facility | 1409 (15.9) | 318 (14.5) | 249 (15.7) | 221 (16.5) |
Skin-to-skin contact | ||||
Yes | 3744 (60.3) | 876 (59.0) | 670 (61.9) | 581 (60.3) |
No | 2948 (39.7) | 753 (41.0) | 504 (38.1) | 454 (39.7) |
Time of first postnatal visit | ||||
No visit | 2400 (33.3) | 651 (37.3) | 378 (30.0) | 380 (35.0) |
<24 hr | 573 (6.7) | 128 (6.4) | 100 (6.5) | 94 (8.3) |
1–6 day | 1734 (28.5) | 437 (29.5) | 312 (30.0) | 258 (26.4) |
≥1 wk | 2015 (31.4) | 413 (26.8) | 384 (33.5) | 303 (30.2) |
Variables | EIBF | EBF | CBF-1 | CBF-2 |
---|---|---|---|---|
Infant’s age (mo)2,3 | 0.97 (0.83, 1.33) | 0.85 (0.74, 0.99)* | ||
0–1 | - | 1.00 (reference) | - | - |
2–3 | - | 0.58 (0.42, 0.79)*** | - | - |
4–5 | - | 0.31 (0.22, 0.42)*** | - | - |
|
||||
Perceived birth size | ||||
Small | 0.71 (0.58, 0.85)** | - | - | - |
Average | 1.00 (reference) | - | - | - |
Large | 0.97 (0.84, 1.13) | - | - | - |
|
||||
Birth pattern | ||||
First child | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | - |
Not first-child, birth interval <2 y | 1.42 (1.09, 1.85)** | 1.69 (1.01, 2.82)* | 1.60 (0.76, 3.38) | - |
Not first-child, birth interval ≥2 y | 1.43 (1.25, 1.63)*** | 1.28 (0.97, 1.70) | 1.87 (1.30, 2.68)** | - |
|
||||
Mother’s education | ||||
No education or primary | - | - | 1.00 (reference) | 1.00 (reference) |
Secondary | - | - | 0.74 (0.44, 1.25) | 0.68 (0.45, 1.04) |
College or higher | - | - | 0.70 (0.36, 1.34) | 0.45 (0.26, 0.77)** |
|
||||
Mother’s occupation | ||||
Not working | - | 1.00 (reference) | 1.00 (reference) | - |
Agriculture | - | 0.81 (0.48, 1.35) | 1.26 (0.54, 2.96) | - |
Others4 | - | 0.65 (0.49, 0.86)** | 0.68 (0.47, 0.99)* | - |
|
||||
Household wealth index | ||||
Poor | - | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Middle | - | 0.67 (0.49, 0.91)* | 0.52 (0.34, 0.78)** | 1.12 (0.77, 1.65) |
Rich | - | 0.75 (0.53, 1.06) | 0.34 (0.21, 0.56)*** | 0.75 (0.51, 1.11) |
|
||||
Mother’s smoking status | ||||
Yes | - | 1.00 (reference) | - | - |
No | - | 2.97 (1.12, 7.89)* | - | - |
|
||||
Antenatal care visit (times) | ||||
None | - | - | 1.00 (reference) | - |
1–3 | - | - | 1.34 (0.35, 5.12) | - |
≥4 | - | - | 2.67 (0.80, 8.92) | - |
|
||||
Cesarean delivery | ||||
Yes | 1.00 (reference) | - | 1.00 (reference) | - |
No | 2.17 (1.83, 2.57)*** | - | 1.76 (1.15, 2.68)** | - |
|
||||
Place of delivery | ||||
Health facility | - | - | 1.00 (reference) | - |
Non-health facility | - | - | 0.73 (0.42, 1.26) | - |
|
||||
Skin-to-skin contact | ||||
Yes | 2.17 (2.23, 2.89)*** | - | - | - |
No | 1.00 (reference) | - | - | - |
|
||||
Time of first postnatal visit | ||||
No visit | - | - | 1.00 (reference) | 1.00 (reference) |
<24 hr | - | - | 1.12 (0.52, 2.38) | 1.36 (0.75, 2.47) |
1–6 day | - | - | 1.42 (0.90, 2.23) | 1.06 (0.72, 1.56) |
≥1 wk | - | - | 1.53 (1.03, 2.28)* | 1.47 (1.00, 2.15)* |
Values are presented as adjusted odds ratio (95% confidence interval).
The final model for EIBF included perceived birth size, birth pattern, type of delivery, and skin-to-skin contact (Archer-Lemeshow goodness-of-fit 0.689); The final model for EBF included infant’s age, birth pattern, mother’s occupation, household wealth index, and mother’s smoking status (Archer-Lemeshow goodness-of-fit 0.508); The final model for CBF-1 included infant’s age, birth pattern, mother’s education, mother’s occupation, household wealth index, antenatal care visits, type of delivery, place of delivery, and time of the first postnatal visit (Archer-Lemeshow goodness-of-fit 0.660); The final model for CBF-2 included infant’s age, mother’s education, household wealth index, and time of the first postnatal visit (Archer-Lemeshow goodness-of-fit 0.883).
EIBF, early initiation of breastfeeding; EBF, exclusive breastfeeding; CBF-1, continued breastfeeding at 1 year; CBF-2, continued breastfeeding at 2 years.
1 The sample sizes of each group are different since models differed by outcome (see Figure 1).
2 Age was not included as a variable in the analyses of EIBF.
3 Fitted as a continuous variable in the analyses of CBF-1 (values: 12, 13, 14, and 15 months) and CBF-2 (values: 20, 21, 22, and 23 months) so that the adjusted odds ratio reflects the effect of a 1-month increase in age.
4 Included those worked as a professional, technician, manager, clerical, sales, and industrial worker.
* p<0.05,
** p<0.01,
*** p<0.001.
Characteristics | EIBF (n=6722) | EBF (n=1629) | CBF-1 (n=1174) | CBF-2 (n=1015) |
---|---|---|---|---|
Bio-demographic variables | ||||
Infant’s age, mean±SD (mo) | 11.6±6.7 | 2.8±1.6 | 13.6±1.1 | 21.0±1.1 |
Sex of the infant | ||||
Male | 3504 (51.7) | 800 (50.3) | 610 (49.7) | 532 (51.9) |
Female | 3218 (48.3) | 829 (49.7) | 564 (50.3) | 503 (48.1) |
Mother’s age at delivery (y) | ||||
≤19 | 626 (9.0) | 161 (9.8) | 120 (9.8) | 80 (7.8) |
20–34 | 4947 (73.7) | 1221 (75.4) | 860 (73.2) | 763 (73.9) |
≥35 | 1149 (17.2) | 247 (14.8) | 193 (17.0) | 192 (18.3) |
Perceived birth size | ||||
Small | 884 (11.8) | 204 (11.4) | 159 (11.3) | 146 (12.5) |
Average | 3620 (57.2) | 888 (56.3) | 616 (58.1) | 556 (59.2) |
Large | 2218 (31.0) | 537 (32.2) | 399 (30.7) | 333 (28.3) |
Birth pattern | ||||
First child | 2161 (33.0) | 504 (31.0) | 398 (34.9) | 330 (33.1) |
Not first-child, birth interval <2 y | 460 (5.6) | 127 (6.9) | 78 (5.6) | 55 (4.5) |
Not first-child, birth interval ≥2 y | 4101 (61.4) | 998 (62.1) | 698 (59.4) | 650 (62.4) |
Place of residence | ||||
Urban | 3326 (49.1) | 758 (47.1) | 591 (49.5) | 524 (50.2) |
Rural | 3396 (50.9) | 871 (52.9) | 583 (50.5) | 511 (49.8) |
| ||||
Socioeconomic variables | ||||
Mother’s education | ||||
Primary or no formal education | 1557 (23.8) | 382 (24.0) | 284 (25.2) | 227 (22.5) |
Secondary | 3835 (59.3) | 939 (60.0) | 650 (57.5) | 592 (59.5) |
College or higher | 1330 (16.9) | 308 (15.9) | 240 (17.2) | 216 (18.0) |
Mother’s occupation | ||||
Not working | 3599 (55.9) | 941 (58.8) | 655 (59.4) | 517 (52.4) |
Agriculture | 550 (6.8) | 111 (5.6) | 97 (7.0) | 85 (8.1) |
Others |
2573 (37.3) | 577 (35.6) | 422 (33.6) | 433 (39.5) |
Household wealth index | ||||
Poor | 2689 (33.3) | 686 (34.3) | 469 (34.6) | 400 (32.5) |
Middle | 2069 (33.3) | 506 (35.0) | 361 (32.1) | 299 (30.7) |
Rich | 1964 (33.3) | 437 (30.7) | 344 (33.3) | 336 (36.8) |
| ||||
Behavioral characteristics | ||||
Mother’s smoking status | ||||
Yes | 127 (1.4) | 23 (1.2) | 20 (0.9) | 24 (2.2) |
No | 6595 (98.6) | 1606 (98.8) | 1154 (99.1) | 1011 (97.8) |
Antenatal care visits (times) | ||||
None | 186 (2.3) | 48 (2.8) | 37 (2.7) | 23 (1.7) |
1–3 | 592 (7.0) | 174 (8.9) | 101 (6.4) | 80 (5.8) |
≥4 | 5944 (90.6) | 1407 (88.3) | 1036 (90.9) | 932 (92.5) |
Cesarean delivery | ||||
Yes | 1230 (18.9) | 288 (18.1) | 206 (18.2) | 194 (19.1) |
No | 5492 (81.1) | 1341 (81.9) | 968 (81.8) | 841 (80.9) |
Place of delivery | ||||
Health facility | 5313 (84.1) | 1311 (85.5) | 925 (84.3) | 814 (83.5) |
Non-health facility | 1409 (15.9) | 318 (14.5) | 249 (15.7) | 221 (16.5) |
Skin-to-skin contact | ||||
Yes | 3744 (60.3) | 876 (59.0) | 670 (61.9) | 581 (60.3) |
No | 2948 (39.7) | 753 (41.0) | 504 (38.1) | 454 (39.7) |
Time of first postnatal visit | ||||
No visit | 2400 (33.3) | 651 (37.3) | 378 (30.0) | 380 (35.0) |
<24 hr | 573 (6.7) | 128 (6.4) | 100 (6.5) | 94 (8.3) |
1–6 day | 1734 (28.5) | 437 (29.5) | 312 (30.0) | 258 (26.4) |
≥1 wk | 2015 (31.4) | 413 (26.8) | 384 (33.5) | 303 (30.2) |
Variables | EIBF | EBF | CBF-1 | CBF-2 |
---|---|---|---|---|
Infant’s age (mo) |
0.97 (0.83, 1.33) | 0.85 (0.74, 0.99) | ||
0–1 | - | 1.00 (reference) | - | - |
2–3 | - | 0.58 (0.42, 0.79) |
- | - |
4–5 | - | 0.31 (0.22, 0.42) |
- | - |
| ||||
Perceived birth size | ||||
Small | 0.71 (0.58, 0.85) |
- | - | - |
Average | 1.00 (reference) | - | - | - |
Large | 0.97 (0.84, 1.13) | - | - | - |
| ||||
Birth pattern | ||||
First child | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) | - |
Not first-child, birth interval <2 y | 1.42 (1.09, 1.85) |
1.69 (1.01, 2.82) |
1.60 (0.76, 3.38) | - |
Not first-child, birth interval ≥2 y | 1.43 (1.25, 1.63) |
1.28 (0.97, 1.70) | 1.87 (1.30, 2.68) |
- |
| ||||
Mother’s education | ||||
No education or primary | - | - | 1.00 (reference) | 1.00 (reference) |
Secondary | - | - | 0.74 (0.44, 1.25) | 0.68 (0.45, 1.04) |
College or higher | - | - | 0.70 (0.36, 1.34) | 0.45 (0.26, 0.77) |
| ||||
Mother’s occupation | ||||
Not working | - | 1.00 (reference) | 1.00 (reference) | - |
Agriculture | - | 0.81 (0.48, 1.35) | 1.26 (0.54, 2.96) | - |
Others |
- | 0.65 (0.49, 0.86) |
0.68 (0.47, 0.99) |
- |
| ||||
Household wealth index | ||||
Poor | - | 1.00 (reference) | 1.00 (reference) | 1.00 (reference) |
Middle | - | 0.67 (0.49, 0.91) |
0.52 (0.34, 0.78) |
1.12 (0.77, 1.65) |
Rich | - | 0.75 (0.53, 1.06) | 0.34 (0.21, 0.56) |
0.75 (0.51, 1.11) |
| ||||
Mother’s smoking status | ||||
Yes | - | 1.00 (reference) | - | - |
No | - | 2.97 (1.12, 7.89) |
- | - |
| ||||
Antenatal care visit (times) | ||||
None | - | - | 1.00 (reference) | - |
1–3 | - | - | 1.34 (0.35, 5.12) | - |
≥4 | - | - | 2.67 (0.80, 8.92) | - |
| ||||
Cesarean delivery | ||||
Yes | 1.00 (reference) | - | 1.00 (reference) | - |
No | 2.17 (1.83, 2.57) |
- | 1.76 (1.15, 2.68) |
- |
| ||||
Place of delivery | ||||
Health facility | - | - | 1.00 (reference) | - |
Non-health facility | - | - | 0.73 (0.42, 1.26) | - |
| ||||
Skin-to-skin contact | ||||
Yes | 2.17 (2.23, 2.89) |
- | - | - |
No | 1.00 (reference) | - | - | - |
| ||||
Time of first postnatal visit | ||||
No visit | - | - | 1.00 (reference) | 1.00 (reference) |
<24 hr | - | - | 1.12 (0.52, 2.38) | 1.36 (0.75, 2.47) |
1–6 day | - | - | 1.42 (0.90, 2.23) | 1.06 (0.72, 1.56) |
≥1 wk | - | - | 1.53 (1.03, 2.28) |
1.47 (1.00, 2.15) |
EIBF, early initiation of breastfeeding; EBF, exclusive breastfeeding; CBF-1, continued breastfeeding at 1 year; CBF-2, continued breastfeeding at 2 years; SD, standard deviation. Included those who worked as a professional, technician, manager, clerical, sales, or industrial worker.
Values are presented as adjusted odds ratio (95% confidence interval). The final model for EIBF included perceived birth size, birth pattern, type of delivery, and skin-to-skin contact (Archer-Lemeshow goodness-of-fit 0.689); The final model for EBF included infant’s age, birth pattern, mother’s occupation, household wealth index, and mother’s smoking status (Archer-Lemeshow goodness-of-fit 0.508); The final model for CBF-1 included infant’s age, birth pattern, mother’s education, mother’s occupation, household wealth index, antenatal care visits, type of delivery, place of delivery, and time of the first postnatal visit (Archer-Lemeshow goodness-of-fit 0.660); The final model for CBF-2 included infant’s age, mother’s education, household wealth index, and time of the first postnatal visit (Archer-Lemeshow goodness-of-fit 0.883). EIBF, early initiation of breastfeeding; EBF, exclusive breastfeeding; CBF-1, continued breastfeeding at 1 year; CBF-2, continued breastfeeding at 2 years. The sample sizes of each group are different since models differed by outcome (see Age was not included as a variable in the analyses of EIBF. Fitted as a continuous variable in the analyses of CBF-1 (values: 12, 13, 14, and 15 months) and CBF-2 (values: 20, 21, 22, and 23 months) so that the adjusted odds ratio reflects the effect of a 1-month increase in age. Included those worked as a professional, technician, manager, clerical, sales, and industrial worker.