TABLE 3. Bivariate and Multivariate Logistic Regression Analysis on Trends in the Cesarean Delivery Rate, Among All Mothers and Stratified by Place of Delivery, Birth Weight, and Birth Multiplicity According to Year of Survey

	No. (%)	OR (95% CI)	aOR (95% CI)
Among All Mothers
2002	629 (18.2)	1.00	1.00
2007	1267 (20.1)	1.13 (1.01–1.25)^*	1.13 (1.01–1.26)^*
2012	1929 (30.3)	1.95 (1.76–2.16)^***	1.90 (1.71–2.11)^***
By Place of Delivery
Public Sector
2002	375 (16.8)	1.00	1.00
2007	768 (19.0)	1.16 (1.01–1.33)^*	1.15 (1.00–1.33)^*
2012	1242 (29.4)	2.05 (1.80–2.34)^***	1.99 (1.74–2.28)^***
Private Sector
2002	254 (20.8)	1.00	1.00
2007	499 (22.0)	1.07 (0.90–1.27)	1.06 (0.88–1.26)
2012	687 (32.2)	1.80 (1.53–2.12)^***	1.70 (1.43–2.02)^***
By Birth Weight
Normal
2002	428 (16.3)	1.00	1.00
2007	890 (18.1)	1.13 (0.99–1.28)	1.11 (0.98–1.26)
2012	1395 (28.4)	2.03 (1.80–2.29)^***	1.93 (1.71–2.19)^***
Low/High
2002	201 (24.2)	1.00	1.00
2007	377 (27.1)	1.17 (0.96–1.42)	1.13 (0.93–1.39)
2012	534 (36.6)	1.81 (1.50–2.20)^***	1.73 (1.42–2.10)^***
By Birth Multiplicity
Singleton Birth
2002	582 (17.3)	1.00	1.00
2007	1194 (19.3)	1.15 (1.03–1.28)^*	1.14 (1.02–1.27)^*
2012	1838 (29.5)	2.01 (1.81–2.23)^***	1.92 (1.72–2.13)^***
Multiple Birth
2002	48 (60.0)	1.00	1.00
2007	73 (589.3)	0.99 (0.55–1.75)	0.98 (0.49–1.95)
2012	92 (65.7)	1.28 (0.72–2.26)	1.29 (0.64–2.58)

Abbreviations: aOR, adjusted odds ratio (for all covariates under analysis); CI, confidence interval; OR, odds ratio.
P value for the trend was obtained by entering the survey year as a continuous variable.
↵^*P< .05; ^*** P< .001.