Table 2.
Associations of levels of physical activity intensity and types during pregnancy with reported breastfeeding at 12 months among Vietnamese women (N = 1715).
| Physical Activity Variables | Any Breastfeeding at 12 Months | Adjusted a OR 95% CI | |
|---|---|---|---|
| Yes | No | ||
| Total PA (METs h/week) | |||
| Mean, SD (125.0, 57.6) | 129.7 (59.0) | 112.9 (52.1) | |
| 1st tertile (8.4–<94.3) | 368 (64.3) | 204 (35.7) | 1.00 |
| 2nd tertile (94.3–<144.2) | 419 (73.2) | 153 (26.8) | 1.38 (1.06–1.79) |
| 3rd tertile (144.2–362.8) | 445 (77.9) | 126 (22.1) | 1.71 (1.29–2.25) |
| Domain of activity | |||
| Household/caregiving (METs h/week) | |||
| Median, IQR (50.1, 52.0) | 53.4 (55.3) | 42.7 (42.7) | |
| 1st tertile (0–<37.3) | 369 (64.1) | 207 (35.9) | 1.00 |
| 2nd tertile (37.3–<68.4) | 412 (72.5) | 156 (27.5) | 1.42 (1.09–1.85) |
| 3rd tertile (68.4–231.0) | 451 (79.0) | 120 (21.0) | 1.85 (1.39–2.47) |
| Occupational (METs h/week) | |||
| Median, IQR (33.6, 45.1) | 33.6 (46.2) | 33.6 (45.1) | |
| 1st tertile (0–<10.7) | 409 (71.2) | 165 (28.8) | 1.00 |
| 2nd tertile (10.7–<41.2) | 400 (70.0) | 171 (30.0) | 1.04 (0.78–1.39) |
| 3rd tertile (41.2–176.2) | 423 (74.2) | 147 (25.8) | 1.23 (0.91–1.66) |
| Sports/exercise (METs h/week) | |||
| Median, IQR (5.6, 5.6) | 5.6 (5.6) | 0.0 (5.6) | |
| 1st tertile (0–0) | 524 (67.4) | 253 (32.6) | 1.00 |
| 2nd tertile (0–<5.6) | 422 (73.1) | 155 (26.9) | 1.20 (0.94–1.54) |
| 3rd tertile (5.6–81.4) | 286 (79.2) | 75 (20.8) | 1.76 (1.30–2.39) |
| Commuting (METs h/week) | |||
| Median, IQR (7.9, 13.1) | 7.9 (13.1) | 7.0 (11.4) | |
| 1st tertile (0–<4.4) | 377 (65.6) | 198 (34.4) | 1.00 |
| 2nd tertile (4.4–<12.3) | 435 (73.6) | 156 (26.4) | 1.35 (1.04–1.76) |
| 3rd tertile (12.3–170.6) | 420 (76.5) | 129 (23.5) | 1.59 (1.21–2.08) |
| Sedentary (h/week) | |||
| Median, IQR (38.0, 33.6) | 38.0 (34.1) | 39.4 (32.2) | |
| 1st tertile (0–<23.1) | 432 (75.4) | 141 (24.6) | 1.00 |
| 2nd tertile (23.1–<46.9) | 395 (68.9) | 178 (31.1) | 0.75 (0.58–0.99) |
| 3rd tertile (46.9–110.1) | 405 (71.2) | 164 (28.8) | 0.74 (0.55–0.99) |
| Light (METs h/week) | |||
| Median, IQR (52.0, 46.2) | 53.9 (46.9) | 47.3 (42.5) | |
| 1st tertile (0–<38.9) | 387 (67.5) | 186 (32.5) | 1.00 |
| 2nd tertile (38.9–<69.3) | 403 (70.3) | 170 (29.7) | 1.03 (0.80–1.34) |
| 3rd tertile (69.3–166.8) | 442 (77.7) | 127 (22.3) | 1.51 (1.14–2.00) |
| Moderate (METs h/week) | |||
| Median, IQR (18.2, 36.4) | 23.1 (37.1) | 12.3 (23.1) | |
| 1st tertile (0–<10.9) | 371 (61.4) | 233 (38.6) | 1.00 |
| 2nd tertile (10.9–<31.9) | 405 (73.8) | 144 (26.2) | 1.63 (1.25–2.11) |
| 3rd tertile (31.9–203.5) | 456 (81.1) | 106 (18.9) | 2.47 (1.86–3.27) |
| Vigorous (METs h/week) (n; %) | |||
| Yes (MET-h/week>0) (1668; 97.3) | 34 (72.3) | 13 (27.7) | 1.16 (0.59–2.26) |
| No (47; 2.7) | 1198 (71.8) | 470 (28.2) | 1.00 |
| Met exercise guideline (n; %) | |||
| Yes b (359; 20.9) | 285 (79.4) | 74 (20.6) | 1.65 (1.23–2.20) |
| No (1356; 79.1) | 947 (69.8) | 409 (30.2) | 1.00 |
a Adjusted for maternal age (<25; 25–35; >35), occupation (currently not working; currently working), education level (secondary school or lower; high school graduate; college/university or above), parity (0; 1; ≥2), pre-pregnancy body mass index (overweight; not overweight), gestational diabetes (yes; no), gestational age (preterm; not preterm), caesarean section (yes; no), low birth weight (yes; no), and admission to neonatal intensive care unit (yes; no); b Meeting Department of Health and Human Services guidelines of > 7.5 MET h/week in sports/exercise activities of moderate-intensity or greater [4]; Abbreviations: OR, Odds ratio; CI, Confident Interval; MET, Metabolic Equivalent of Task; SD, Standard Deviation; IQR, Interquartile Range. Bolded odds ratio values are significant.