Table 2. Slope indexes of inequality in birth outcomes and prenatal care by maternal education and health insurance scheme, 2008–2018.

	Slope Index of Inequality (CI 95%)
	Low birth weight* (per 1,000 births)	5-minute Apgar score less than 7 (per 1,000 births)	Prenatal visits (number of visits)
Maternal education
Overall	14.10 (13.48, 14.72)	4.24 (3.96, 4.51)	1.75 (1.74, 1.76)
2008	11.10 (8.95, 13.26)	5.08 (4.06, 6.11)	1.67 (1.64, 1.71)
2009	14.20 (11.98, 16.41)	3.93 (3.02, 4.84)	1.78 (1.75, 1.81)
2010	15.03 (12.76, 17.31)	3.64 (2.72, 4.56)	1.53 (1.50, 1.56)
2011	12.85 (10.68, 15.02)	3.95 (3.04, 4.86)	1.60 (1.57, 1.63)
2012	14.18 (12.10, 16.26)	3.42 (2.53, 4.31)	1.62 (1.59, 1.65)
2013	14.04 (12.01, 16.07)	3.56 (2.61, 4.50)	1.85 (1.82, 1.88)
2014	8.84 (6.95, 10.72)	5.64 (4.72, 6.57)	1.71 (1.68, 1.74)
2015	11.24 (9.36, 13.12)	3.68 (2.83, 4.53)	1.72 (1.69, 1.75)
2016	14.05 (12.09, 16.00)	3.28 (2.41, 4.15)	1.74 (1.71, 1.77)
2017	13.77 (11.84, 15.71)	5.17 (4.28, 6.07)	1.77 (1.74, 1.81)
2018	13.36 (11.41, 15.31)	3.06 (2.21, 3.91)	1.78 (1.74, 1.81)
Health insurance scheme
Overall	10.77 (10.19, 11.35)	4.29 (4.04, 4.54)	2.34 (2.34, 2.35)
2008	7.91 (5.91, 9.92)	3.76 (2.85, 4.67)	2.72 (2.69, 2.74)
2009	9.00 (6.96, 11.04)	3.90 (3.07, 4.73)	2.75 (2.72, 2.78)
2010	10.93 (8.86, 13.00)	3.75 (2.97, 4.54)	2.36 (2.33, 2.39)
2011	12.66 (10.65, 14.68)	6.07 (5.23, 6.91)	2.44 (2.41, 2.46)
2012	13.33 (11.41, 15.25)	4.81 (4.00, 5.62)	2.44 (2.41, 2.46)
2013	10.26 (8.35, 12.16)	6.29 (5.43, 7.15)	2.47 (2.44, 2.50)
2014	7.96 (6.18, 9.74)	5.42 (4.60, 6.25)	2.11 (2.08, 2.14)
2015	9.36 (7.57, 11.14)	2.90 (2.12, 3.67)	1.89 (1.86, 1.92)
2016	9.76 (7.90, 11.61)	3.57 (2.76, 4.38)	1.86 (1.83, 1.89)
2017	8.48 (6.66, 10.31)	2.87 (2.01, 3.73)	1.90 (1.87, 1.93)
2018	10.38 (8.51, 12.24)	3.12 (2.33, 3.91)	2.34 (2.31, 2.37)

*less than 2,500 grams at birth