Predictors of any breastfeeding initiation by deprivation area 2003 – 2009
| Most deprived | Least deprived | |||||||
|---|---|---|---|---|---|---|---|---|
| Predictive variables – any breastfeeding and bottle feeding | n | % | OR | 95% CI | n | % | OR | 95% CI |
| Mother's age | ||||||||
| Less than 24 years | 8,847 | 58% | 1.00 | 613 | 13% | 1.00 | ||
| 25 - 34 years | 5,567 | 36% | 1.47 | (1.33 - 1.63) | 3,050 | 65% | 1.22 | (1.01 - 1.46) |
| 35 + years | 966 | 6% | 1.61 | (1.33 - 1.93) | 1,062 | 22% | - | - |
| Father/Partner's age | ||||||||
| Less than 24 years | 5,276 | 34% | 1.00 | 328 | 7% | 1.00 | ||
| 25 - 34 years | 5,966 | 39% | 1.41 | (1.28 - 1.56) | 2,281 | 48% | 1.37 | (1.10 - 1.70) |
| 35 + years | 1,986 | 13% | 1.56 | (1.35 - 1.81) | 1,485 | 31% | 1.72 | (1.36 - 2.19) |
| Unknown age | 2,152 | 14% | - | - | 631 | 13% | - | - |
| Marital status | ||||||||
| Married | 3,380 | 22% | 1.00 | 3,459 | 73% | 1.00 | ||
| Co-habiting | 5,721 | 37% | 0.81 | (0.73 - 0.91) | 852 | 18% | 0.73 | (0.59 - 0.89) |
| Single parents/parents living apart | 6,279 | 41% | 0.55 | (0.48 - 0.62) | 414 | 9% | 0.60 | (0.44 - 0.82) |
| Mother's country of birth | ||||||||
| Non-British birth | 13,462 | 88% | 4,334 | 92% | 1.00 | |||
| British birth | 1,918 | 12% | 3.73 | (3.03 - 4.59) | 391 | 8% | 2.81 | (1.82 - 4.36) |
| Father's country of birth | ||||||||
| British birth | 11,592 | 3% | 1.00 | 4,245 | 90% | 1.00 | ||
| Non-British birth | 1,821 | 12% | 2.40 | (1.98 - 2.92) | 341 | 7% | 1.62 | (1.10 - 2.39) |
| Unknown country of birth | 1,967 | 13% | - | - | 139 | 3% | - | - |
| Mother's socioeconomic status | ||||||||
| Higher manager/professional | 2,178 | 14% | 1.00 | 2,785 | 59% | 1.00 | ||
| Intermediate | 3,276 | 21% | 0.59 | (0.52 - 0.67) | 1,103 | 23% | 0.51 | (0.43 - 0.62) |
| Routine/semi routine | 5,686 | 37% | 0.47 | (0.42 - 0.54) | 476 | 10% | 0.40 | (0.32 - 0.52) |
| Students | 779 | 5% | 0.70 | (0.56 - 0.87) | 110 | 2% | - | - |
| Unknown | 3,461 | 23% | 0.40 | (0.35 - 0.47) | 251 | 5% | 0.48 | (0.33 - 0.71) |
| Father's socioeconomic status | ||||||||
| Higher manager/professional | 1,998 | 13% | 1.00 | 2,628 | 56% | 1.00 | ||
| Intermediate | 1,892 | 12% | 0.82 | (0.72 - 0.95) | 920 | 19% | 0.77 | (0.63 - 0.95) |
| Routine/semi routine | 8,024 | 52% | 0.64 | (0.57 - 0.71) | 942 | 20% | 0.57 | (0.47 - 0.70) |
| Students | 453 | 3% | - | - | 44 | 1% | - | - |
| Unknown status / Other unemployed | 3013 | 20% | 0.59 | (0.48 - 0.72) | 28 | 1% | - | - |
| Parent origin | ||||||||
| Both parents of British origin | 11,087 | 72% | 1.00 | 4,008 | 85% | - | - | |
| Either parent of Non-British origin | 856 | 6% | 1.24 | (1.04 - 1.47) | 276 | 6% | - | - |
| Both parents of Non-British origin | 1,106 | 7% | - | - | 264 | 6% | - | - |
| Unknown origin | 2,331 | 15% | - | - | 177 | 4% | - | - |
| Maternal religious background | ||||||||
| Christian | 14,118 | 92% | 1.00 | 4,399 | 93% | - | - | |
| Muslim | 566 | 4% | 1.82 | (1.34 - 2.48) | 193 | 4% | - | - |
| Buddhist | 258 | 2% | 0.64 | (0.45 - 0.93) | 34 | 1% | - | - |
| Sikh | 41 | 0% | 4.85 | (1.35 - 17.46) | 45 | 1% | - | - |
| Hindu | 66 | 0% | - | - | 21 | 0% | - | - |
| Jewish | 10 | 0% | - | - | 4 | 0% | - | - |
| Unknown | 321 | 2% | - | - | 29 | 1% | - | - |
| Maternal body mass index | ||||||||
| Normal BMI | 3,303 | 21% | 1.00 | 1,581 | 33% | - | - | |
| Underweight | 246 | 2% | 0.67 | (0.48 - 0.95) | 35 | 1% | - | - |
| Overweight | 1,634 | 11% | 1.19 | (1.04 - 1.35) | 760 | 16% | - | - |
| Obese | 1,137 | 7% | - | - | 376 | 8% | - | - |
| Unknown BMI | 9,060 | 59% | - | - | 1,973 | 42% | - | - |
| Maternal health at delivery | ||||||||
| No ill health | 13,831 | 90% | - | - | 4,154 | 88% | 1.00 | |
| Infant ill health | 1,549 | 10% | - | - | 571 | 12% | 0.75 | (0.58 - 0.96) |
| Maternal smoking status at first visit | ||||||||
| Non-smoker | 10,683 | 69% | 1.00 | 4,338 | 92% | 1.00 | ||
| Smoker | 4,293 | 28% | 0.57 | (0.51 - 0.62) | 262 | 6% | 0.63 | (0.46 - 0.86) |
| Unknown smoking status | 404 | 3% | 0.62 | (0.48 - 0.79) | 125 | 3% | - | - |
| Infant weight by gestation | ||||||||
| Normal weight/gestation | 14,448 | 94% | 1.00 | 4,583 | 97% | 1.00 | ||
| Small weight for gestation | 911 | 6% | 0.75 | (0.62 - 0.89) | 138 | 3% | 0.54 | (0.36 - 0.82) |
| Estimated gestation | ||||||||
| Normal gestation | 13,803 | 90% | 1.00 | 4,284 | 91% | 1.00 | ||
| Pre-term gestation <37 weeks | 1,081 | 7% | 1.18 | (1.01 - 1.37) | 277 | 6% | 0.62 | (0.46 - 0.84) |
| Post term gestation >43 weeks | 44 | 0% | - | - | 9 | 0% | - | - |
| Unknown gestation | 452 | 3% | - | - | 155 | 3% | - | - |
| Hospital | ||||||||
| Maternity unit A | 1,805 | 12% | 1.00 | 732 | 15% | 1.00 | ||
| Maternity unit B | 7,180 | 47% | 0.84 | (0.77 - 0.91) | 1,202 | 25% | 0.59 | (0.44 - 0.79) |
| Maternity unit C | 2,830 | 18% | - | - | 1,553 | 33% | 0.73 | (0.55 - 0.98) |
| Maternity unit D | 3,159 | 21% | - | - | 1,169 | 25% | 0.56 | (0.42 - 0.75) |
| Maternity unit E | 406 | 3% | - | - | 69 | 1% | 0.43 | (0.23 - 0.82) |
| Year of birth | ||||||||
| 2003-2009 | 15,380 | 100% | 0.97 | (0.95 - 0.99) | 4,725 | 100% | - | - |
| Model Diagnostics | ||||||||
| Total number (n) | 13,272 | 4545 | ||||||
| Goodness of fit | p >0.5 (good) | p >0.5 (good) | ||||||
| Area under the curve | 79% (good) | 72% (good) | ||||||
| Adjusted R2 | 19% | 10% | ||||||
- not significant (p>0.05) n/a: not applicable (not included in the model)