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. 2020 Sep 10:1–6. doi: 10.1017/dmp.2020.334

TABLE 1.

Summary Statistics

Variable Percentage/Mean SD Min Max
Dependent Variable
Edinburgh Postnatal Depression Scale (EPDS) ≥ 13 (1: EPDS ≥ 13, 0: EPDS < 13) 17.0% 0.38 0 1
Anhedonia 0.72 1.11 0 6
Anxiety 3.68 2.28 0 9
Depression 1.82 2.05 0 9
Independent Variables
COVID-19-related variables
Experiences during COVID-19
 Changes of place of delivery (1: Yes, 0: No) 7.8% 0.27 0 1
 Cancellation of parenting classes (1: Yes, 0: No) 79.3% 0.40 0 1
 Prohibition of visitors at hospitals (before and after the delivery) (1: Yes, 0: No) 70.0% 0.46 0 1
 Prohibition of an entry of a partner into delivery room (1: Yes, 0: No) 63.5% 0.48 0 1
 Cancellation of planned informal support (1: Yes, 0: No) 12.6% 0.33 0 1
 Cancellation of planned formal support (1: Yes, 0: No) 10.0% 0.30 0 1
 Lifestyle changes with a partner working from home (1: Yes, 0: No) 20.0% 0.40 0 1
Perceived risk (COVID-19 related): How respondents think they will be directly affected by following things in the next 6 months.
 Financial difficulties (1: Not at all likely – 7: Very likely) 3.86 1.90 1 7
 COVID-19 infection (1: Not at all likely – 7: Very likely) 4.09 1.55 1 7
 Not receiving formal childcare support (1: Not at all likely – 7: Very likely) 4.39 1.84 1 7
 Not receiving informal childcare support (1: Not at all likely – 7: Very likely) 3.40 1.93 1 7
Place of residence: Mothers were grouped into the following categories based on the day the state of emergency ended. The longest duration was Tokyo/Kanagawa/Saitama/Chiba followed by Hokkaido, Osaka/Kyoto/Hyogo, and Aichi/Fukuoka.
 Tokyo/Kanagawa/Saitama/Chiba (1: Tokyo/Kanagawa/Saitama/Chiba, 0: Other) 35.23% 0.48 0 1
 Osaka/Kyoto/Hyogo (1: Osaka/Kyoto/Hyogo, 0: Other) 16.77% 0.37 0 1
 Aichi/Fukuoka (1: Aichi/Fukuoka, 0: Other) 12.27% 0.33 0 1
 Hokkaido (1: Hokkaido, 0: Other) 3.10% 0.17 0 1
 Other prefectures (1: Other prefectures, 0: Other) 32.64% 0.47 0 1
Respondents’ sociodemographic, socioeconomic information.
 Age of the respondents (mother’s age)
 Age < 25 years (1: age < 25 years, 0: Other) 5.35% 0.23 0 1
 Age 25-29 years (1: 25 years ≤ age < 30, 0: Other) 29.21% 0.45 0 1
 Age 30-34 years (1: 30 years ≤ age < 35, 0: Other) 37.20% 0.48 0 1
 Age ≥ 35 years (1: age ≥ 35 years, 0: Other) 28.25% 0.45 0 1
Nulliparous (1: Nulliparous, 0: Primiparous or multiparous) 65.17% 0.48 0 1
Pregnancy stage
 First trimester 13.22% 0.34 0 1
 Second trimester 41.70% 0.49 0 1
 Third trimester 45.08% 0.50 0 1
Number of children 0.5273 0.93 0 9
Household annual total income including tax
 Lower income group (1: < 5 million yen 0: ≥ 5 million yen)
44.46% 0.50 0 1
Working/full-time housewife status
 Full-time employed worker (1: Full-time employed worker, 0: Other) 48.68% 0.50 0 1
 Full-time housewife/student (1: Full-time housewife/student, 0: Other) 27.07% 0.44 0 1
 Working for family business/freelancer (1: Working for family business/freelancer, 0: Other) 2.98% 0.17 0 1
 Contracted/part-time employed worker (1: Contracted/part-time employed worker, 0: Other) 19.75% 0.40 0 1
 Unemployed (under job search) (1: Unemployed, 0: Other) 1.52% 0.12 0 1
Highest educational attainment
 Educational attainment less than 16 years (1: < 16 years, 0: ≥ 16 years) 19.30% 0.39 0 1
Marital status
 Married (1: Married, 0: Other) 96.40% 0.19 0 1
 Unmarried (1: Unmarried, 0: Other) 2.76% 0.16 0 1
 Divorced/widowed (1: Divorced/widowed, 0: Other) 0.84% 0.09 0 1
Number of family members who have been involved in childcare on a daily basis in the past 2 months (we have specified the period as the past 2 months since it was the time that most people have faced closure of childcare support center/nursery/kindergarten) 2.08 1.79 0 11

n = 1777