Table 4.

Multivariable analysis: main breast-feeding indicators by selected predictive factors. Pooled analysis of data from the two national breast-feeding prevalence studies in Greece (2007 and 2017)

Predictive factor	EBF1 (N 1041*)		ABF6 (N 1080*)
	Adjusted OR	95 % CI	Adjusted OR	95 % CI
Study
2007	Ref.	–	Ref.	–
2017	1·97	1·37, 2·84	2·19	1·65, 2·90
Maternal age
Continuous variable	1·03	1·00, 1·06	NA†
Infant gender
Male	Ref.	–	NA†
Female	1·49	1·11, 2·00
Maternal educational attainment
Primary, secondary and post-secondary education	Ref.	–	Ref.	–
Tertiary education	1·64	1·15, 2·35	1·81	1·30, 2·51
Caesarean section
No	Ref.	–	NA†
Yes	0·68	0·50, 0·92
Maternal smoking at the time of interview
No	Ref.	–	Ref.	–
Yes	0·57	0·39, 0·83	0·23	0·15, 0·34
Private insurance
No	Ref.	–	NA†
Yes	2·01	1·30, 3·11
Low birth weight
No	Ref.	–	Ref.	–
Yes	0·36	0·16, 0·80	0·26	0·13, 0·53
Skin to skin contact within first hour from birth
No	Ref.	–	Ref.	–
Yes	2·23	1·55, 3·22	1·54	1·18, 2·00
Prescription for infant formula on discharge from maternity hospital
No	Ref.	–	Ref.	–
Yes	0·48	0·35, 0·66	0·49	0·36, 0·65
Maternal country of origin
Greece	NA†		Ref.	–
Albania			3·75	2·01, 7·00
Other			1·58	0·93, 2·67

EBF, exclusive breast-feeding at the 1st completed month of age; ABF6, any breast-feeding at the 6th completed month of age; ref., reference category.

^*Participants with no missing values for any of the variables were included in the model.

^†Not applicable (variable not included in the final regression model, see ‘Methods’ section).