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. Author manuscript; available in PMC: 2015 Sep 2.
Published in final edited form as: Am J Ind Med. 2012 Aug 21;56(6):647–659. doi: 10.1002/ajim.22108

TABLE II.

Population-Based Prevalence Rates and Confidence Intervals for Work Organization Characteristics Among US Adults Who Worked in the Past 12 Months, by Demographic and Geographic Characteristics (National Health Interview Survey, 2010)

Working ≥ 48 hr
per weekb
Working ≥ 60 hr
per weekb
Non-standard
work arrangement
Temporary
position
Alternative
shift
Samplea Est. population
in thousands
Exp.a %(95%CI) Exp.a %(95%CI) Exp.a %(95%CI) Exp.a %(95%CI) Exp.a %(95%CI)
Total 17,524 155,262 2,518 187(18.0–19.5) 972 7.2(6.7–7.7) 3,391 18.7(18.0–19.4) 1,326 7.2(6.8–7.7) 4,973 28.7(27.9–29.6)
Sex
  Male 8,500 81,412, 1,643 24.5(23.3–25.7) 639 9.5(8.7–10.4) 1,833 20.9(19.8–21.9) 671 7.8(7.1–8.5) 2,509 294(28.2–30.7)
  Female 9,024 73,850 875 12.2(11.3–13.1) 333 4.5(4.0–5.2) 1,558 16.4(15.5–17.3) 655 6.6(6.0–7.3) 2,464 28.0(26.8–29.2)
Age group (yrs.)
  18–29 4,059 38,916 363 11.1 (9.9–12.4) 131 3.9(3.2–4.7) 682 16.1 (14.8–17.5) 482 12.3(11.1–13.7) 1,601 43.0(41.0–45.1)
  30–44 5,967 49,624 1,010 22.2(20.8–23.5) 375 8.4(7.5–9.4) 1,051 16.5(15.4–17.7) 395 5.7(5.0–6.4) 1,517 25.1 (23.8–26.4)
  45–64 6,506 59,041 1,066 21.2(19.9–22.6) 427 8.3(7.5–9.3) 1,299 19.9(18.7–21.1) 359 4.9(4.3–5.5) 1,554 22.2(21.1–23.5)
≥65 992 7,681 79 11.5(9.1–14.5) 39 5.1 (3.7–7.1) 359 37.7(34.3–41.3) 90 9.4(7.5–11.8) 301 30.3(26.9–33.9)
Race/ethnicity
  Non-Hispanic white 9,997 106,033 1,719 20.9(20.0–22.0) 674 8.1 (7.4–8.8) 1,882 18.6(17.7–19.5) 618 6.2(5.6–6.8) 2,782 28.1 (27.0–29.2)
  Non-Hispanic black 2,600 16,822 252 13.4(11.6–15.4) 102 5.8(4.6–7.1) 458 17.3(15.6–19.1) 215 8.7(7.5–10.2) 875 34.5(32.3–36.8)
  Hispanic 3,464 22,273 357 13.4(11.8–15.1) 126 4.8(3.8–6.0) 800 21.7(20.0–23.5) 371 10.6(9.3–12.1) 921 27.7(25.8–29.6)
  Non-Hispanic Asian/Native 1,132 7,450 150 16.6(13.9–19.9) 58 5.9(4.3–8.0) 192 16.3(13.9–19.1) 86 6.7(5.0–8.8) 274 26.2(22.8–29.8)
  Hawaiian or Other Pacific Islander
  Non-Hispanic American Indian/Alaska Native 69 764 12 14.1 (7.9–23.9) 23 28.5(18.6–41.0)
  Non-Hispanic Other race 262 1,920 33 14.9(10.1–21.6) 47 17.4(12.7–23.4) 31 12.0(8.2–17.3) 98 37.3(30.8–44.3)
Marital status
  Married 8,105 86,431 1,361 21.6(20.5–22.8) 523 8.2(7.5–8.9) 1,606 19.2(18.2–20.2) 507 5.5(5.0–6.0) 1,914 22.9(21.9–24.0)
  Widowed 514 2,902 51 13.6(10.2–17.9) 22 6.2(4.0–9.4) 121 23.8(19.8–28.3) 37 7.1 (4.8–10.5) 134 25.7(21.5–30.4)
  Divorced or separated 2,983 17,626 445 19.7(17.9–21.7) 161 6.8(5.7–8.1) 578 18.8(17.1–20.5) 195 6.3(5.2–7.7) 838 28.3(26.4–30.3)
  Never married 4,661 35,565 506 12.0(10.8–13.3) 204 5.0(4.3–5.9) 847 17.5(16.2–19.0) 480 11.5(10.3–12.9) 1,669 41.6(39.7–43.6)
  Living with partner 1,232 12,564 150 15.6(13.2–18.4) 61 6.5(5.0–8.5) 230 17.6(15.3–20.1) 104 8.2(6.6–10.0) 410 33.5(30.5–36.6)
Educationc
  Less than HS diploma 1,812 13,049 183 14.0(11.9–16.3) 61 5.1 (3.9–6.7) 485 25.3(23.0–27.8) 211 10.4(8.8–12.3) 508 26.3(23.9–28.9)
  HS/GED diploma 3,685 32,164 486 17.4(15.8–19.1) 192 7.0(6.0–8.2) 687 19.5(18.0–21.1) 213 5.6(4.8–6.6) 1,073 28.8(26.9–30.8)
  Some college 4,656 39,755 686 19.4(18.0–20.9) 273 7.6(6.6–8.7) 867 18.4(17.1–19.8) 272 5.6(4.8–6.4) 1,333 28.1 (26.5–29.7)
  BA/BS degree and higher 5,284 48,309 1,032 24.6(23.1–26.3) 396 9.2(8.2–10.3) 956 17.3(16.1–18.5) 312 5.3(4.6–6.1) 1,051 19.0(17.9–20.3)
Class of worker
  Private company for wages 12,859 113,927 1,819 18.4(17.6–19.3) 637 6.5(6.0–7.1) 1,666 11.8(11.1–12.5) 876 6.5(6.0–7.0) 3,739 29.9(28.9–31.0)
  Federal, state, or local government 2,915 25,494 325 14.3(12.7–16.2) 115 5.1 (4.1–6.3) 312 11.1 (9.7–12.6) 244 8.5(7.3–9.9) 519 16.9(15.3–18.7)
  Self-employed in own business,
  professional, or farm
1,594 14,520 362 28.7(25.9–31.8) 211 15.9(13.6–18.4) 1,337 83.9(81.7–85.8) 183 10.4(8.7–12.3) 648 38.8(35.9–41.8)
  Working without pay in family
owned business or farm
78 718 61 77.9(64.5–87.2) 13 *10.0 (5.2–18.4) 41 55.4(41.9–68.1)
Place of residence
  Large MSA 9,796 84,107 1,350 17.9(16.9–19.0) 508 6.7(6.1–7.4) 1,910 18.9(18.0–19.9) 739 7.1 (6.5–7.8) 2,677 27.6(26.4–28.7)
  Small MSA 5,266 48,741 755 18.4(17.1–19.9) 296 7.0(6.2–7.9) 980 17.9(16.7–19.1) 407 7.6(6.7–8.5) 1,554 30.1 (28.5–31.7)
  Not in MSA 2,462 22,414 413 22.4(20.1–24.8) 168 9.4(8.0–11.0) 501 19.9(18.1–21.8) 180 6.9(5.8–8.3) 742 30.3(27.7–32.9)
Region
  Northeast 2,685 27,043 376 17.8(15.9–19.7) 141 6.2(5.1–7.4) 486 17.8(16.2–19.5) 178 6.4(5.4–7.6) 732 28.6(26.5–30.8)
  Midwest 3,948 36,932 636 20.9(19.3–22.6) 246 8.6(7.4–9.9) 667 17.0(15.7–18.5) 274 7.0(5.9–8.2) 1,240 31.7(29.7–33.7)
  South 6,421 54,415 947 19.3(18.0–20.6) 344 7.1 (6.3–7.9) 1,216 17.8(16.7–19.0) 465 6.9(6.2–7.6) 1,795 27.7(26.2–29.2)
  West 4,470 36,873 559 16.3(15.0–17.8) 241 6.7(5.8–7.6) 1,022 22.4(20.9–24.0) 409 8.6(7.6–9.8) 1,206 27.5(25.8–29.3)

Est., estimated; Exp, exposed; CI, confidence interval; HS, high school; GED, general educational development; BA/BS, bachelor’s; MSA, metropolitan statistical area.

All estimates weighted unless otherwise noted.

a

Unweighted.

b

Currently employed adults working only one job.

c

Education only shown for persons aged 25 years and over.

Estimates with a relative standard error >50% or based on cell sizes ≤10 are not shown as they do not meet standards of reliability/precision.

*

Estimates preceded by an asterisk have a relative standard error >30% and ≤50% and should be used with caution as they do not meet standards of reliability/precision.