Table 1.

Characteristics of sample of 1,237 girls ages 6–8 years at baseline by study site for household SEP variables, girl's race/ethnicity, mother's age at menarche and place of birth, and girl's BMI%, the BCERP

VariableSan Francisco area (n = 444) n (%)Cincinnati area (n = 377) n (%)New York City (East Harlem; n = 416) n (%)All (N = 1,237) n (%)
SEP index
 Quintile 1 (lowest)18 (4.2)19 (6.8)184 (51.8)221 (20.8)
 Quintile 263 (14.8)32 (11.5)116 (32.7)211 (19.9)
 Quintile 392 (21.5)71 (25.4)47 (13.2)210 (19.8)
 Quintile 4119 (27.8)83 (29.7)7 (2.0)209 (19.7)
 Quintile 5135 (31.6)74 (26.5)1 (0.3)210 (19.8)
 Total427 (100)279 (100)355 (100)1,061 (100)
 Missing17 (5.0)98 (26.0)61 (14.7)176 (14.2)
Household income
 <$25,00022 (3.8)33 (11.1)209 (54.4)264 (23.6)
 $25–50,00072 (16.5)57 (19.1)116 (30.2)245 (21.9)
 $50–100,000156 (35.7)114 (38.3)52 (13.5)322 (28.8)
 ≥$100,000187 (42.8)94 (31.5)7 (1.8)288 (25.7)
 Total437 (100)298 (100)384 (100)1,119 (100)
 Missing7 (1.6)79 (21.0)32 (7.7)118 (9.5)
Education of mother
 ≤High school79 (18.1)40 (12.3)231 (60.8)350 (30.6)
 Some college or vocational129 (29.6)126 (38.7)107 (28.2)362 (31.7)
 Bachelor's degree136 (31.2)106 (32.5)30 (7.9)272 (23.8)
 Master's degree or higher92 (21.1)54 (16.6)12 (3.2)158 (13.8)
 Total436 (100)326 (100)380 (100)1,142 (100)
 Missing8 (1.8)51 (13.5)36 (8.7)95 (7.7)
Occupation of primary financial provider
 Manual54 (12.3)54 (17.1)157 (46.4)265 (24.2)
 Nonmanual207 (47.2)123(38.9)132 (39.1)462 (42.3)
 Professional178 (40.5)139 (44.0)49 (14.5)366 (33.5)
 Total439 (100)316 (100)338 (100)1,093 (100)
 Missing5 (1.1)61 (16.2)78 (18.8)144 (11.6)
Home ownership
 Rent122 (27.6)72 (23.1)386 (94.4)580 (49.9)
 Other320 (72.4)240 (76.9)23 (5.6)583 (50.1)
 Total442 (100)312 (100)409 (100)1,163 (100)
 Missing2 (0.5)65 (17.2)7 (1.7)74 (6.0)
Female head of household
 Yes54 (12.2)63 (18.6)121 (29.5)238 (19.9)
 No390 (87.8)276 (81.4)289 (70.5)955 (80.1)
 Total444 (100)339 (100)410 (100)1,193 (100)
 Missing0 (0.0)38 (10.1)6 (1.4)44 (3.6)
Mother's place of birth
 U.S. state/Canada319 (72.0)326 (95.9)202 (49.8)847 (71.2)
 Mexico47 (10.6)3 (0.9)112 (27.6)162 (13.6)
 Other Latin America/Puerto Rico/Virgin Islands19 (4.3)5 (1.5)83 (20.4)107 (9.0)
 Rest of world58 (13.1)6 (1.8)9 (2.2)73 (6.1)
 Total443 (100)340 (100)406 (100)1,189 (100)
 Missing1 (0.2)37 (9.8)10 (2.4)48 (3.9)
Mother's age at menarche (years)
 <12104 (23.7)74 (22.1)118 (30.3)296 (25.5)
 12–13234 (53.3)190 (56.7)180 (46.3)604 (51.9)
 ≥14101 (23.0)71 (21.2)91 (23.4)263 (22.6)
 Total439 (100)335 (100)389 (100)1,163 (100)
 Missing5 (1.1)42 (11.1)27 (6.5)74 (6.0)
Girl's race/ethnicity
 White187 (42.1)231 (61.3)0 (0)418 (33.8)
 Black97 (21.8)126 (33.4)167 (40.1)390 (31.5)
 Hispanic108 (24.3)15 (4.0)249 (59.9)372 (30.1)
 Asian52 (11.7)5 (1.3)0 (0)57 (4.6)
 Total444 (100)377 (100)416 (100)1,237 (100)
 Missing0 (0.0)0 (0.0)0 (0.0)0 (0.0)
Girl's BMI (at baseline) BMI%
 BMI > 85th percentile132 (29.7)113 (30.0)163 (39.4)408 (33.0)
 BMI 50–85th percentile163 (36.7)122 (32.4)135 (32.6)420 (34.0)
 BMI < 50th percentile149 (33.6)142 (37.7)116 (28.0)407 (33.0)
 Total444 (100)377 (100)414 (100)1,235 (100)
 Missing0 (0.0)0 (0.0)2 (0.5)2 (0.2)
  • Note: P < 0.0001 for comparisons of all tabulated variables by site, except BMI% (P < 0.01).