Regularized Feature Selection in Categorical PLS for Multicollinear Data

Table 1

Influential features obtained from which affects the occurrence or nonoccurrence of stillbirths among women are presented with counts, %, , and odds’ ratios (OR).

Feature	Cases
		Born alive		Stillbirth
	Levels	Count	%	Count	%		OR
Region	Punjab	36	66.7	18	33.3	Reference
	Sindh	24	64.9	13	35.1	0.516	1.08
	KPK	22	75.9	7	24.1	0.270	0.64
	Balochistan	12	57.1	9	42.9	0.004	1.51
Residence place	Urban	46	78.0	13	22.0	Reference
	Rural	48	58.5	34	41.5	0.012	2.50
Mother’s age	19	12	63.2	7	36.8	Reference
	20–26	47	64.4	26	35.6	0.561	0.94
	27–33	35	71.4	14	28.6	0.050	0.685
Nurse assistance	No	23	56.1	18	43.9	Reference
	Yes	71	71.0	29	29.0	0.015	0.979
Traditional assistance	No	64	66.0	33	34.0	Reference
	Yes	30	68.2	14	31.8	0.017	0.901
ANC timing	1st	8	53.3	7	46.7	Reference
	2nd	29	61.7	18	38.3	0.840	0.7094
	3rd	57	72.2	22	27.8	0.045	0.441
Pregnancy complications	No	50	67.6	24	32.4	Reference
	Yes	44	65.7	23	34.3	0.057	1.089
Iron tablets	No	54	65.9	28	34.1	Reference
	Yes	40	67.8	19	32.2	.044	0.916
Dependent medical help	No	51	76.1	16	23.9	Reference
	Yes	39	58.1	31	41.9	.005	2.533
Husband education	Illiterate	14	50.0	14	50.0	Reference
	Primary	14	63.6	8	36.4	.099	0.571
	Secondary	37	69.8	16	30.2	.004	0.432
	Higher	29	76.3	9	23.7	.028	0.310
Working women	No	12	44.4	15	55.6	Reference
	Yes	82	71.9	32	28.1	.004	0.312
Pregnancy order	1–3	59	78.7	16	21.3	Reference
	4–6	27	60.0	18	40.0	.002	2.46
		8	38.1	13	61.9	.004	5.99