Reference

Eligible population

Type of study or methods

Date(s) of enrollment

Subgroup (n = eligible subjects)

Contacted or Located (% of eligible)

Responded or Enrolled (Response Rate)

Comments

Iowa Persian Gulf Study Group 1997

Iowa listed as home of record on initial military record, and service in regular military or activated National Guard/Reserve sometime from 8/2/1990-7/31/1991, identified by Defense Manpower Data Center, Monterey CA, DOD (n = 28,968)

Population based interview study Stratum random sample with proportional allocation—64 strata (GW, type of military, age, sex, race, rank, branch), Pilot study not eligible

9/1995-5/1996

Total 4,886

4,072 (83.3%)

3,695 (90.7%; 75.6% of eligible)

Limited assessment of selection bias

Reference

Purpose

Study design

Population

Comments

(where appropriate)

Eligible

Located

Enrolled (Response Rate)

Lange et al. 2002

Exposures to Kuwait oil fires and asthma and bronchitis

Cross-sectional survey

Population described in Iowa Persian Gulf Study Group 1997 excluding 336 with unknown exposure information: n = 1,560