Table 3 Cox regression for cessation of breastfeeding and introduction of complementary foods, Nairobi informal settlements, Kenya

Sex

   Girls

Ref

Ref

Ref

Ref

   Boys

0.98

[0.80, 1.21]

0.88

[0.71, 1.10]

1.03

[0.99, 1.08]

1.05*

[1.00, 1.09]

Mother's age

   < 25 years

Ref

Ref

Ref

Ref

   25-34 years

1.18

[0.94, 1.48]

1.22

[0.92, 1.62]

0.99

[0.95, 1.04]

1.01

[0.95, 1.06]

   35+ years

1.40#

[0.95, 2.05]

1.52#

[0.96, 2.40]

1.02

[0.94, 1.11]

1.01

[0.92, 1.12]

Mother's Marital Status

   In union

Ref

Ref

Ref

Ref

   Ever in union

2.52***

[1.87, 3.40]

2.76***

[1.97, 3.88]

1.10*

[1.02, 1.19]

1.07

[0.98, 1.16]

   Never in union

1.31

[0.93, 1.84]

1.73**

[1.17, 2.55]

1.16***

[1.08, 1.24]

1.23***

[1.13, 1.34]

Mothers ethnicity

   Kikuyu

Ref

Ref

Ref

Ref

   Luhya

1.20

[0.86, 1.69]

1.54*

[1.06, 2.23]

1.21***

[1.13, 1.29]

1.19***

[1.12, 1.28]

   Luo

1.28

[0.93, 1.77]

1.83***

[1.28, 2.62]

1.16***

[1.09, 1.23]

1.12**

[1.04, 1.19]

   Kamba

0.91

[0.64, 1.28]

1.16

[0.79, 1.71]

0.98

[0.92, 1.04]

1.02

[0.95, 1.09]

   Other

1.49*

[1.09, 2.03]

2.08***

[1.48, 2.92]

1.07*

[1.00, 1.14]

1.09*

[1.02, 1.17]

Mother's education level

   < Secondary

Ref

Ref

Ref

Ref

   Secondary+

0.61***

[0.45, 0.81]

0.58***

[0.43, 0.80]

0.88***

[0.84, 0.92]

0.92**

[0.87, 0.97]

Mother's Parity

   One

Ref

Ref

Ref

Ref

   Two

1.41*

[1.08, 1.83]

1.23

[0.91, 1.66]

1.04

[0.99, 1.10]

1.04

[0.98, 1.10]

   Three+

1.20

[0.93, 1.55]

0.91

[0.64, 1.30]

1.03

[0.99, 1.08]

1.01

[0.94, 1.07]

Pregnancy desirability

Wanted at

conception

Ref

Ref

Ref

Ref

   Wanted later

0.95

[0.76, 1.20]

0.90

[0.69, 1.17]

1.01

[0.96, 1.05]

0.93**

[0.89, 0.98]

   Never wanted

1.45*

[1.09, 1.94]

1.08

[0.76, 1.54]

1.15***

[1.08, 1.22]

1.05

[0.98, 1.13]

Delivery place

   Health Facility

Ref

Ref

Ref

Ref

   Home

0.93

[0.73, 1.17]

0.89

[0.69, 1.15]

1.19***

[1.14, 1.25]

1.19***

[1.14, 1.25]

Perceived size at birth

   Normal

Ref

Ref

Ref

Ref

   Smaller

1.20

[0.91, 1.59]

0.95

[0.70, 1.30]

1.03

[0.97, 1.09]

1.03

[0.97, 1.10]

   Larger

0.61**

[0.43, 0.87]

0.55**

[0.38, 0.81]

0.96

[0.91, 1.01]

0.97

[0.92, 1.04]

SES Category

   Poorest

Ref

Ref

Ref

Ref

   Middle

0.89

[0.70, 1.13]

0.97

[0.75, 1.25]

0.95*

[0.91, 0.99]

1.01

[0.97, 1.06]

   Least Poor

1.03

[0.69, 1.54]

1.10

[0.71, 1.68]

0.90*

[0.84, 0.98]

0.96

[0.89, 1.05]

Slum

   Korogocho

Ref

Ref

Ref

Ref

   Viwandani

0.86

[0.70, 1.06]

1.20

[0.92, 1.55]

0.85***

[0.82, 0.89]

0.89***

[0.85, 0.94]