Adolescent sexual initiation and pregnancy: what more can be learned through further analysis of the demographic and health surveys in the Philippines?

Table 1 Percentage distribution of adolescents by sexual initiation and pregnancy indicators across three DHS rounds, Philippines, 2003, 2008 and 2013

	Weighted count (Percentage distribution, by column) [95% Confidence Intervals]
Adolescent sub-population	2003	2008	2013	P-value^
Ever had sex				< 0.001
No	2370	2374	2762
	(89.5%)	(86.4%)	(85.4%)
	[88.2,90.7]	[84.9,87.7]	[83.9,86.7]
Yes	278	375	472
	(10.5%)	(13.6%)***	(14.6%)***
	[9.3,11.8]	[12.3,15.1]	[13.3,16.1]
Total	2648	2748	3234
Total	(100.0%)	(100.0%)	(100.0%)
Ever been pregnant, all women				0.022
No	2428	2463	2902
	(91.7%)	(89.6%)	(89.7%)
	[90.5,92.8]	[88.3,90.7]	[88.4,90.8]
Yes	220	286	335
	(8.3%)	(10.4%)*	(10.3%)*
	[7.2,9.5]	[9.3,11.7]	[9.2,11.6]
Total	2648	2749	3237
Total	(100.0%)	(100.0%)	(100.0%)
Ever been pregnant, women with sexual experience only				0.038
No	58	89	138
	(20.8%)	(23.6%)	(29.1%)
	[16.5,26.0]	[19.2,28.7]	[25.1,33.5]
Yes	220	286	335
	(79.2%)	(76.4%)	(70.9%)*
	[74.0,83.5]	[71.3,80.8]	[66.5,74.9]
Total	278	375	472
Total	(100.0%)	(100.0%)	(100.0%)

Note: There are slight discrepancies in weighted count totals due to missing (non-response) data. P-values were derived using Pearson’s chi-square test. Asterisks within cells indicate P-values derived from further analysis for selected variables which compares each 2008 and 2013 row value to the base year (2003) of that row through bivariate logistic regression, and where *** P < 0.001, ** P < 0.010, and * P < 0.050. Odds ratios and P-values from the further analyses are cited in the narratives and shown in table form in Appendix 2

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