TABLE 1. Background Characteristics of Survey Respondents by Year of Survey, Weighted Numbers (Percentages)
Characteristics2002 (N = 3,450)2007 (N = 6,307)2012 (N = 6,365)
SOCIODEMOGRAPHIC
Age, y
 15–1955 (1.6)123 (1.9)135 (2.1)
 20–24515 (14.9)974 (15.4)854 (13.4)
 25–29884 (25.6)1654 (26.2)1669 (26.2)
 ≥ 301997 (57.9)3556 (56.4)3707 (58.2)
Place of Residence
 Urban2705 (78.4)5298 (84.0)5198 (81.7)
 Rural746 (21.6)1009 (16.0)1167 (18.3)
Geographic Region
 Central2191 (63.5)3908 (62.0)3935 (61.8)
 North930 (27.0)1844 (29.2)1821 (28.6)
 South329 (9.5)555 (8.8)609 (9.6)
Mother's Education
 No education128 (3.7)147 (2.3)114 (1.8)
 Primary277 (8.0)337 (5.3)373 (5.9)
 Secondary2087 (60.5)3885 (61.6)3825 (60.1)
 Higher959 (27.8)1939 (30.7)2053 (32.2)
Husband's Education
 No education65 (1.9)91 (1.5)59 (0.9)
 Primary371 (10.8)665 (10.6)661 (10.4)
 Secondary1980 (57.4)3793 (60.3)4000 (62.8)
 Higher1034 (30.0)1745 (27.7)1645 (25.8)
 Missing (Do not know)12 (0.2)1 (0.02)
Employment
 Unemployed3101 (89.9)5526 (87.6)5381 (84.5)
 Employed350 (10.1)781 (12.4)985 (15.5)
Place of Delivery
 Public sector2229 (64.6)4036 (64.0)4230 (66.5)
 Private sector1221 (35.4)2271 (36.0)2135 (33.5)
Wealth Index
 Poorest786 (22.8)1462 (23.2)1313 (20.6)
 Poorer881 (25.5)1475 (23.4)1365 (21.4)
 Middle740 (21.4)1368 (21.7)1437 (22.6)
 Richer594 (17.2)1131 (17.9)1291 (20.3)
 Richest450 (13.0)872 (13.8)960 (15.1)
OBSTETRIC
Age at First Birth, y
 12–18687 (19.9)1110 (17.6)917 (14.4)
 19–242010 (58.3)3661 (58.1)3747 (58.9)
 25–30645 (18.7)1289 (20.4)1369 (21.5)
 > 30107 (3.1)246 (3.9)332 (5.2)
Parity in Last 5 Years
 11881 (54.5)3531 (56.0)3733 (58.6)
 21263 (36.6)2254 (35.7)2182 (34.3)
 ≥ 3307 (8.9)522 (8.3)451 (7.1)
Birth Weight, g
 Normal (2500–3999)2618 (75.9)4916 (77.9)4907 (77.1)
 Low or High (< 2500 or ≥ 4000)832 (24.1)1391 (22.1)1458 (22.9)
Birth Multiplicity
 Singleton birth3371 (97.7)6185 (98.1)6225 (97.8)
 Multiple birth80 (2.3)123 (1.9)140 (2.2)
  • All data are reported as No. (%).