Table 4 Nutrition knowledge (NK) scores: Baseline vs. post-intervention samples.

From: Multicomponent intervention increases nutrition knowledge scores in rural China

Variables

Baseline sample(n = 275)

Post-intervention sample(n = 275)

Between-sample comparison

NK score

Intra-group Comparison

NK score

Intra-group Comparison

Median (Q1-Q3)*

Min–Max#

Statistic

p-value

Median (Q1-Q3)

Min–Max

Statistic

p-value

StatisticΨ

p-value

All

60.0 (54.0–66.0)

32.0–96.0

  

70.0(64.0–74.0)

32.0–96.0

  

10.862

0.000

Gender

  

2.651Ψ

0.008

  

0.675Ψ

0.500

  

Male

58.0(52.0–66.0)

10.0–84.0

  

70.0(64.0–74.0)

34.0–92.0

  

7.441

0.000

Female

62.0(56.0–68.0)

18.0–78.0

  

70.0(64.0–74.0)

32.0–96.0

  

7.930

0.000

Age group, years

  

56.701 £

0.000

  

0.498 £

0.779

  

18–34

64.0(56.0–70.0)

10.0–84.0

  

70.0(66.0–74.0)

42.0–96.0

  

5.239

0.000

35–49

58.0(54.0–66.0)

20.0–78.0

  

70.0(64.0–74.0)

48.0–90.0

  

7.451

0.000

50–64

56.0(48.0–62.0)

20.0–74.0

  

70.0(62.0–74.0)

32.0–96.0

  

6.561

0.000

Village

  

19.174 £

0.000

  

10.224 £

0.037

  

JTC village

62.0(56.0–70.0)γ

28.0–84.0

  

72.0(60.0–76.0)

32.0–86.0

  

3.865

0.000

LY village

62.0(54.0–66.0)

10.0–74.0

  

68.0(64.0–74.0)

40.0–90.0

  

5.092

0.000

QY village

62.0(56.0–70.0)ξ

36.0–80.0

  

70.0(62.0–74.0)

34.0–88.0

  

2.840

0.005

SLS village

58.0(44.0–64.0)γξ

18.0–74.0

  

72.0(66.0–76.0)

56.0–96.0

  

7.189

0.000

ZW village

58.0(54.0–64.0)

42.0–72.0

  

69.0(60.0–74.0)

48.0–80.0

  

5.062

0.000

Educational level

  

113.309£

0.000

  

8.359 £

0.039

  

Primary school and below

56.0(50.0–62.0)γξ

18.0–74.0

  

72.0(61.5–76.0)

40.0–88.0

  

5.741

0.000

Junior high school

56.0(50.0–64.0)πδ

18.0–74.0

  

70.0(62.0–74.0)

32.0–96.0

  

7.541

0.000

High school/Vocational school/Technical school

64.0(57.5–68.0)γπ

10.0–80.0

  

68.0(62.0–74.0)

44.0–96.0

  

3.132

0.000

College degree and above

68.0(62.0–72.0)ξδ

44.0–84.0

  

72.0(66.0–78.0)

46.0–86.0

  

4.312

0.000

Occupation

  

−4.155Ψ

0.000

  

−0.427 Ψ

0.670

  

Healthcare, Food, Education, Wellness-related Industries

66.0(61.0–70.0)

18.0–76.0

  

70.0(64.0–74.0)

48.0–96.0

  

2.291

0.022

Other industries

60.0(54.0–66.0)

10.0–84.0

  

70.0(64.0–74.0)

32.0–90.0

  

10.826

0.000

Common chronic illness

  

−1.682 Ψ

0.093

  

−0.552 Ψ

0.581

  

Yes

62.0(54.0–68.0)

38.0–74.0

  

70.0(62.0–79.0)

48.0–96.0

  

10.030

0.000

No

58.0(52.0–64.0)

10.0–84.0

  

70.0(64.0–74.0)

32.0–96.0

  

4.252

0.000

  1. * Q1:first quartile,Q3: third quartile; # Min:minimum, Max: maximum.Ψ signifies that the Mann–Whitney U test was utilized for statistical analysis, employing a standardized test statistic. Meanwhile, £ denotes the use of the Kruskal–Wallis H test. When conducting pairwise comparisons within groups, various Greek letters such as γ, ξ, π, and δ are adopted to indicate statistically significant differences as ascertained by the Mann–Whitney U test