Table 2.

Unadjusted and fully adjusted Odd ratios (OR) and 95% Confidence Interval (CI) of short birth interval (<=24 months) for young women of reproductive age (15–24 years old) based on logistic regression and Bayesian geo-additive model

Variables	n = 1389%	Un-Adjusted		Adjusted		Bayesian
		Odds ratio	95% C.I.	Odds ratio	95% C.I.	Odds ratio	95% C.I.
Province of residence
Kinshasa	35.7	RC		RC		0.85	0.69, 1.03
Bas Congo	26.9	0.66	0.34, 1.30	0.89	0.44, 1.77	0.80	0.64, 0.97
Bandundu	22.7	0.53	0.27, 1.03	0.73	0.36, 1.47	0.80	0.62, 1.02
Equateur	33.1	0.89	0.51, 1.56	1.22	0.67, 2.24	0.98	0.91, 1.15
Orientale	30.4	0.79	0.43, 1.45	0.98	0.52, 1.86	0.91	0.77, 1.08
Nord-Kivu	47.9	1.65	0.95, 2.88	2.07	1.16, 3.69	1.22	1.00, 1.54
Maniema	35.7	1.00	0.58, 1.73	1.32	0.74, 2.35	1.02	0.88, 1.20
Sud-Kivu	53.9	2.11	1.22, 3.65	2.58	1.46, 4.56	1.34	1.14, 1.63
Katanga	43.7	1.40	0.79, 2.48	1.71	0.94, 3.12	1.15	0.92, 1.42
Kasaï Occidental	38.7	1.14	0.65, 1.99	1.39	0.78, 2.49	1.07	0.91, 1.29
Kasaï Oriental	42.2	1.31	0.77, 2.25	1.59	0.91, 2.77	1.03	0.87, 1.22
Location of residence
Urban	41.4	RC
Rural	37.3	0.84	0.67, 1.06			1.03	0.86, 1.21
Household economic status
Low income households	37.6	0.73	0.57, 0.93	0.75	0.57, 0.97	0.78	0.65, 0.96
Middle income households	30.6	0.53	0.39, 0.73	0.55	0.39, 0.77	0.63	0.82, 1.00
High income households	45.3	RC		RC
Education
No education	38.9	1.08	0.80, 1.44			1.07	0.86, 1.31
Primary	39.5	1.11	0.85, 1.45			1.12	0.91, 1.35
Secondary and higher	37.1	RC
Age
15-19	47.3	1.47	1.02,2.12	1.36	0.93, 1.97
20-24	37.9	RC		RC
Use of contraception
Not using	39.2	1.21	0.87, 1.70			0.99	0.73, 1.32
Traditional or folkloric	34.7	1.31	0.76, 2.24
Modern method	41.0	RC
Breastfeeding practice in DRC
Never	38.6	0.96	0.74, 1.25			1.03	0.82, 1.24
Exclusive	37.0	0.90	0.68, 1.19			0.91	0.77, 1.07
Mixed	39.5	RC