Table 2 Odds ratios for low muscle mass prevalence according to RT frequency and sex

Total

 Non-RT

112,219

0.00 ± 0.00

0.00 ± 0.00

0.00 ± 0.00

0.00

1 (reference)^a

1 (reference)^a

 1 day/week

782

1.00 ± 0.00

44.51 ± 31.59

18.08 ± 41.51

70.84

1.30 (1.07–1.58)^**

0.98 (0.74–1.32)

 2 days/week

1,859

2.00 ± 0.00

103.86 ± 59.89

27.95 ± 54.47

79.29

0.92 (0.80–1.07)

0.84 (0.69–1.03)

 3–4 days/week

6,329

3.42 ± 0.49

201.98 ± 116.28

25.24 ± 46.85

82.04

0.75 (0.69–0.82)^****

0.78 (0.69–0.88)^****

 ≥5 days/week

5,150

5.86 ± 0.89

368.36 ± 214.38

24.76 ± 47.87

87.65

0.87 (0.80–0.95)^**

0.73 (0.64–0.83)^****

Men

 Non-RT

38,696

0.00 ± 0.00

0.00 ± 0.00

0.00 ± 0.00

0.00

1 (reference)^a

1 (reference)^a

 1 day/week

394

1.00 ± 0.00

43.66 ± 31.87

22.65 ± 54.80

73.10

1.00 (0.79–1.27)

1.17 (0.80–1.71)

 2 days/week

849

2.00 ± 0.00

101.08 ± 61.70

32.48 ± 66.85

81.15

0.73 (0.61–0.87)^***

0.85 (0.65–1.12)

 3–4 days/week

2,673

3.44 ± 0.50

193.62 ± 121.23

28.69 ± 56.82

84.55

0.62 (0.56–0.69)^****

0.76 (0.65–0.89)^***

 ≥5 days/week

2,464

6.01 ± 0.91

350.32 ± 222.82

27.29 ± 56.71

90.38

0.74 (0.66–0.82)^****

0.73 (0.62–0.86)^***

Women

 Non-RT

73,523

0.00 ± 0.00

0.00 ± 0.00

0.00 ± 0.00

0.00

1 (reference)^a

1 (reference)^a

 1 day/week

388

1.00 ± 0.00

45.38 ± 31.32

13.44 ± 19.62

68.56

1.22 (0.86–1.75)

0.74 (0.46–1.19)

 2 days/week

1,010

2.00 ± 0.00

106.20 ± 58.26

24.14 ± 40.94

77.72

0.94 (0.73–1.20)

0.81 (0.60–1.11)

 3–4 days/week

3,656

3.40 ± 0.49

208.09 ± 112.15

22.72 ± 37.76

80.20

0.75 (0.65–0.87)^***

0.80 (0.67–0.96)^*

 ≥5 days/week

2,686

5.71 ± 0.85

384.91 ± 204.98

22.44 ± 37.86

85.15

0.69 (0.58–0.83)^****

0.73 (0.59–0.91)^**