Skip to main content
Industrial Health logoLink to Industrial Health
. 2020 Oct 8;58(5):487. doi: 10.2486/indhealth.2019-0126e1

Erratum: Objective and Subjective Working Hours and Their Roles on Workers’ Health among Japanese Employees

Yuko OCHIAI 1,*, Masaya TAKAHASHI 1, Tomoaki MATSUO 1, Takeshi SASAKI 1, Kenji FUKASAWA 2, Tsuyoshi ARAKI 2, Masao TSUCHIYA 2, Yasumasa OTSUKA 3
PMCID: PMC7557412  PMID: 33028794

Table 3 of the above paper appeared incorrectly in print. Percentage figures on the table were inadvertently listed as negative values. These errors were corrected in online versions of this paper, as shown below.

Table 3

Table 3. Results of the χ2 tests in OWH/SWH.

Objective working hours per weeka ≥1 to 35 h/w (N=318) ≥35 to 50 h/w (N=2,220) ≥50 to 60 h/w (N=3,797) ≥60 h/w (N=366) p d




N (%)b N (%) N (%) N (%)
Gender <0.001
Men 80 (25.2) 1,124 (50.6) 2,844 (74.9) 333 (91.0)
Women 238 (74.8) 1,096 (49.4) 953 (25.1) 33 (9.0)
Age (yr) <0.001
≤29 25 (7.9) 647 (29.1) 1,179 (31.1) 11 (3.0)
30–39 87 (27.4) 675 (30.4) 1,437 (37.8) 188 (51.4)
40–49 91 (28.6) 508 (22.9) 836 (22.0) 141 (38.5)
≥50 115 (36.2) 390 (17.6) 345 (9.1) 26 (7.1)
Job type
Manager 6 (1.9) 267 (12.0) 764 (20.1) 260 (71.0) <0.001
Nonmanagerial 312 (98.1) 1,953 (88.0) 3,033 (79.9) 106 (29.0)

Subjective working hours per weekc ≥1 to 35 h/w (N=1,184) ≥35 to 50 h/w (N=4,725) ≥50 to 60 h/w (N=703) ≥60 h/w (N=194) p




N (%) N (%) N (%) N (%)

Gender <0.001
Men 609 (51.4) 3,123 (66.1) 567 (80.7) 149 (76.8)
Wemen 575 (48.6) 1,602 (33.9) 136 (19.3) 45 (23.2)
Age (yr) <0.001
≤29 331 (28.0) 1,365 (28.9) 138 (19.6) 41 (21.1)
30–39 409 (34.5) 1,653 (35.0) 276 (39.3) 75 (38.7)
40–49 238 (20.1) 1,103 (23.3) 219 (31.2) 53 (27.3)
≥50 206 (17.4) 604 (12.8) 70 (10.0) 25 (12.9)
Job type <0.001
Manager 112 (9.5) 851 (18.0) 298 (42.4) 70 (36.1)
Nonmanagerial 1,072 (90.5) 3,874 (82.0) 405 (57.6) 124 (63.9)

a: By the personnel records of October, 2017. b: Figures do not always add up to 100% due to rounding data. c: By answers to the questionnaire about last month (conducted in November, 2017). d: p-value of χ2-test for categorical variables. OWH: objective working hours; SWH: subjective working hours.


Articles from Industrial Health are provided here courtesy of National Institute of Occupational Safety and Health, Japan

RESOURCES