Table 2a

Summary Statistics for Children aged 0–5

Variable	Children 0–5 (N = 159,275)		Children 0–1 (N = 44,663)		Children 2–5 (N = 114,612)
Variable	Mean	Standard Deviation	Mean	Standard Deviation	Mean	Standard Deviation
Children’s characteristics
Year	92.094	1.987	92.192	1.908	92.056	2.016
Male = 1	0.51	0.5	0.511	0.5	0.509	0.5
Age	2.671	1.607	0.632	0.482	3.466	1.116
White, non-Hispanic = 1	0.6	0.49	0.63	0.483	0.588	0.492
Number of years observed in sample	3.187	1.601	2.493	1.369	3.458	1.604
Moved in year = 1 (observed consecutively)	0.291	0.454	0.236	0.425	0.3	0.458
Moved in year = 1 (not observed consecutively)	0.317	0.465	0.24	0.427	0.329	0.47
Gone next year = 1	0.259	0.438	0.272	0.445	0.254	0.435
Hospitalized at least once during year	0.102	0.302	0.248	0.432	0.045	0.207
Hospitalized in MTF	0.063	0.242	0.138	0.345	0.033	0.179
Hospitalized in MTF for respiratory condition	0.016	0.126	0.028	0.165	0.012	0.107
Hospitalized in MTF for external cause	0.004	0.06	0.003	0.058	0.004	0.06
Hospitalized in MTF for nonrespiratory condition	0.046	0.209	0.112	0.315	0.02	0.139
Father and mother characteristics
Number of dependents (including wife)	2.43	1.204	2.227	1.174	2.51	1.206
Some college or higher	0.118	0.323	0.102	0.303	0.124	0.33
Father’s age	29.259	5.283	27.566	5.241	29.919	5.151
Mother hospitalized at least once during year	0.202	0.401	0.362	0.481	0.139	0.346
Mother hospitalized in MTF	0.138	0.345	0.244	0.429	0.096	0.295
Mother hospitalized in MTF for pregnancy-related	0.108	0.31	0.223	0.416	0.063	0.242
Total active military service in months	106.497	61.969	87.629	60.435	113.85	60.996
Number of months since reenlistment	30.03	26.618	27.038	24.307	31.196	27.378
In the military fewer than six years = 1	0.249	0.433	0.385	0.487	0.196	0.397
Increased rank (observed consecutively) = 1	0.188	0.391	0.227	0.419	0.174	0.379
Increased education (observed consecutively) = 1	0.021	0.143	0.019	0.136	0.022	0.145

Sample: children aged 0–5 of married men enlisted in the army and stationed in the Continental United States between 1989 and 1995, excluding stepchildren, children of officers, and those without access to an MTF. The sample is further restricted to individuals in bases with at least one monitor for each pollutant within 50 miles. Observations with missing values for age, gender, occupation (PMOS), rank, and duty base identifier were also dropped.