TABLE 1

Characteristics of Study Population: Preimplementation (June–November 2009) and Postimplementation (June–November 2010) Periods of the Immunization Data Exchange Between the New York CIR and the Study Sites; 2012–2013 Cohort Assessed for Record Completion

2009 Preimplementation Cohort (n = 6452), no. (%)2010 Postimplementation Cohort (n = 6124), no. (%)P*2012–2013 (n = 8548), no. (%)
Age.29
 19–35 mo1846 (28.6)1799 (29.4)2197 (25.7)
 7–10 y2344 (36.3)2144 (35.0)3323 (38.9)
 13–17 y2262 (35.1)2181 (35.6)3028 (35.4)
Gender.80
 Female3262 (50.6)3110 (50.8)4268 (49.9)
 Male3190 (49.4)3014 (49.2)4280 (50.1)
Language.85
 Spanish3940 (61.5)3678 (61.0)4936 (59.4)
 English2387 (37.3)2275 (37.8)3225 (38.8)
 Other78 (1.2)72 (1.2)149 (1.8)
Insurance.17
 Public insurance5616 (88.2)5395 (89.3)7578 (90.4)
 Commercial479 (7.5)408 (6.7)504 (6.0)
 Uninsured270 (4.2)239 (4.0)298 (3.6)
  • * P value for χ2 tests comparing 2009 and 2010 groups.