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. Author manuscript; available in PMC: 2017 May 1.
Published in final edited form as: Am J Ind Med. 2016 Mar 11;59(5):408–423. doi: 10.1002/ajim.22578

TABLE I.

Demographic and Work Characteristics Among Hired Crop Workers in the United States During NAWS Period I (1999, 2002–2004) and Period II (2008–2010)

Characteristic Data collection years
Period I
Period II
Weighted percent n = 13,604 95%CI Weighted percent n = 5,873 95%CI
Age (years)
 14–17 3.8 3.0–4.6 2.3 1.2–3.3
 18–24 27.4 25.7–29.1 20.7 17.7–23.8
 25–34 27.9 26.3–29.6 24.7 22.0–27.4
 35–44 22.3 21.1–23.6 23.0 20.3–25.7
 45–54 11.7 10.7–12.7 18.7 16.3–21.1
 55+ 6.8 6.0–7.8 10.6 8.9–12.3
Gender and age (years)
 Male 76.9 74.6–79.3 75.7 72.6–78.8
  <25 24.8 23.2–26.6 18.0 15.3–20.7
  25–34 21.2 19.7–22.6 18.8 16.4–21.3
  35–44 16.6 15.4–17.8 16.7 15.1–18.6
  45+ 14.3 13.2–15.5 22.1 19.4–24.8
 Female 23.1 20.7–25.4 24.3 21.2–27.4
  <25 6.3 5.2–7.5 5.0 3.8–6.2
  25–34 6.8 5.8–7.7 5.9 4.8–7.0
  35–44 5.8 4.7–6.8 6.2 4.5–7.9
  45+ 4.2 3.5–4.8 7.2 5.3–9.0
Country of birth/ethnicity
 US White 10.9 9.0–12.7 17.2 13.5–20.9
 US Hispanic 7.0 5.6–8.4 5.7 3.7–7.7
 US other 4.1 3.0–5.2 2.6 1.6–3.6
 Mexican 74.9 72.3–77.6 69.1 64.4–73.8
 All other 3.1 2.1–4.1 5.3 3.7–6.9
English language fluency
 Not at all 43.0 40.5–45.4 32.6 28.6–36.7
 Somewhat 34.3 32.5–36.0 38.4 35.1–41.6
 Well 22.8 20.5–25.0 29.0 24.3–33.7
Highest grade completed by country
 Foreign born 78.1 75.6–80.5 74.5 69.9–79.0
  No education 4.0 3.3–4.7 4.5 3.4–5.6
  1st–6th grade 46.1 43.9–48.2 40.0 36.4–43.7
  7th–11th grade 21.6 20.0–23.3 18.5 16.2–20.9
  12th+grade 6.3 5.5–7.1 11.4 8.9–13.8
 US born 21.9 19.4–24.5 25.5 21.0–30.1
  No education 0.1 0.06–0.23
  1st–6th grade 1.8 1.2–2.3 0.9 0.2–1.6
  7th–11th grade 7.4 6.2–8.6 6.6 4.9–8.3
  12th+grade 12.7 10.8–14.6 18.0 8.9–13.8
Region where interviewed
 East 15.4 12.8–17.9 12.9 10.0–15.8
 Southeast 12.7 10.5–14.9 11.7 9.0–14.5
 Midwest 16.4 13.5–19.4 19.7 13.5–25.9
 Southwest 8.1 6.3–9.8 7.6 5.7–9.5
 West 12.2 9.2–15.1 16.4 12.4–20.5
 California 35.3 31.9–38.8 31.6 26.6–36.6
Migranta
 Non-migrant (settled) 60.5 57.4–63.6 73.6 69.1–78.1
 Migrant 39.5 36.4–42.6 26.4 21.9–30.9
  Follow the crop 8.9 7.2–10.5 6.8 4.9–8.7
  Shuttle 30.7 28.0–33.3 19.6 15.1–24.1
Documentation status
 Citizen 24.6 21.8–27.4 30.0 24.9–35.1
  <25 6.8 5.6–8.0 7.4 4.4–10.4
  25–34 4.7 3.6–5.8 4.4 3.2–5.6
  35–44 5.5 4.6–6.4 5.2 3.9–6.5
  45+ 7.6 6.6–8.6 13.0 10.7–15.3
 Documented 25.3 22.4–28.2 20.4 17.5–23.3
  <25 2.8 1.9–3.7 1.9 0.7–3.1
  25–34 5.7 4.8–6.6 2.2 1.5–2.9
  35–44 9.4 8.2–10.6 6.4 5.0–7.8
  45+ 7.4 6.5–8.3 9.8 8.4–11.2
 Undocumented 50.1 45.3–55.0 49.6 40.6–58.6
  <25 21.7 19.2–24.2 13.8 10.0–17.6
  25–34 17.6 15.7–19.5 18.2 15.2–21.2
  35–44 7.4 6.1–8.7 11.5 7.8–15.2
  45+ 3.4 2.8–4.0 6.2 4.9–7.5
Number of employers
 One 72.9 70.6–75.3 80.1 76.3–83.9
 Two or more 27.1 24.7–29.4 19.9 16.1–23.7
Type of hire
 Direct 78.6 75.4–81.9 86.6 82.4–90.8
 Indirect (labor contractor) 21.4 18.1–24.6 13.4 9.2–17.6
Type of work
 Field work 73.4 69.5–77.3 70.4 65.1–75.8
 Nursery 20.4 17.1–23.8 23.1 18.1–28.0
 Packing 6.2 3.7–8.7 6.5 3.8–9.2
Duration of farm work in US
 <12 months 17.2 15.3–19.1 10.3 7.5–13.2
 12–23 months 8.8 7.6–10.0 5.6 4.6–6.6
 2–5 years 19.6 18.2–21.1 15.8 13.8–17.8
 6–10 years 15.6 14.3–16.8 20.1 17.3–23.0
 11–20 years 21.3 20.0–22.6 21.0 18.5–23.5
 21+years 17.5 16.0–18.9 27.2 24.0–30.3
Handled pesticides in the last year with “yes” by age (years)
 No 88.5 86.9–90.0 84.0 81.4–86.5
 Yes 11.4 9.9–13.0 16.0 13.5–18.6
  <25 2.1 1.6–2.6 2.5 1.6–3.3
  25–34 2.5 2.1–2.9 3.8 2.9–4.8
  35–44 3.5 2.8–4.2 4.4 3.3–5.5
  45+ 3.3 2.7–4.0 5.4 4.2–6.6
Used healthcare in the last 2 years in the US
 No 53.5 51.3–55.8 40.5 37.2–43.7
 Yes 46.5 44.2–48.7 59.5 56.3–62.8
Health condition
 No 84.2 82.8–85.6 81.1 78.7–83.5
 Yes 15.8 14.4–17.2 18.9 16.5–21.3
Musculoskeletal complaints
 No 79.5 77.8–81.2 85.1 83.1–87.2
 Yes 20.5 18.8–22.2 14.9 12.8–16.9

NAWS, National Agricultural Workers Survey; n, sample size; CI, confidence interval.

a

NAWS classifies hired crop workers as non-migrant (or settled) or migrant, with migrant workers being further subcategorized as either shuttle or follow-the-crop [Carroll et al., 2005]. Shuttle workers travel 75 miles or more from their home for farm work within a single location. Follow-the-crop workers are those that travel to multiple locations for farm work.