Table 3 Results of factor analysis for low birth weight risk assessment scale (25 items)

1. Guidance at each checkup

0.775

909

10.8

3.5

5–20

 I restricted my food intake as I was concerned about gaining weight

0.727

 During pregnancy checkups, I was often given advice about my weight gain by medical staff

0.723

 I did not like going to checkups because the medical staff frequently advised me about my weight gain during previous pregnancy checkups

0.716

 I was always concerned about weight gain

0.630

 I restricted my food intake as I was concerned about gaining weight

0.425

2. Adequate rest

0.778

915

11.2

2.7

4–16

 I took adequate rest

0.923

 I took holidays

0.898

 I slept well

0.428

 When I woke from my sleep, I felt refreshed

0.399

3. Support from husband

0.900

914

5.8

1.9

2–8

 I am satisfied with my husband’s support

0.901

 My husband thoroughly supported me

0.898

4. Effects on fetus

0.895

910

6.4

2.3

2–8

 I thought about the effects of alcohol consumption on the fetus

0.910

 I thought about the effects of smoking on the fetus

0.899

5. Support from society

0.861

913

5.3

2.0

2–8

 People other than my husband and parents (including in-laws) thoroughly supported me

0.904

 I am satisfied with the support that I received from others besides my husband and parents (including in-laws)

0.809

6. Support from family

0.853

916

6.5

1.7

2–8

 I am satisfied with my parents’ (including in-laws) support

0.901

 My parents (including in-laws) thoroughly supported me

0.798

7. Effects of minor troubles

0.648

908

6.7

2.2

3–12

 I had severe morning sickness

0.818

 At one point, I believed that severe morning sickness must be hereditary

0.647

 I experienced unpleasant symptoms such as headaches

0.416

8. Good lifestyle habits

0.585

916

8.3

1.8

3–12

 I tried to eat well-balanced meals

0.687

 I was able to lead a regular lifestyle

0.520

 I exercised adequately

0.415

9. Fall risk and lifestyle changes

0.697

913

7.5

1.1

2–8

 I was careful not to fall

0.795

 I switched to shoes with low heels

0.676

Scale total scores

888

68.5

8.1

32–93

 Inter-factor correlation

1

1.00

2

−0.107

1.00

3

−0.005

0.191

1.00

4

0.069

− 0.007

−0.034

1.00

5

−0.018

0.132

0.342

0.016

1.00

6

0.009

0.186

0.395

0.026

0.417

1.00

7

0.147

−0.084

−0.018

0.136

−0.015

0.056

1.00

8

0.045

0.336

0.135

0.158

0.071

0.033

−0.117

1.00

9

0.135

0.051

0.084

0.234

0.080

0.135

0.053

0.131