Table 3.
Mean (SE) | Gardening Intervention | Waitlist Control | ||||
---|---|---|---|---|---|---|
| ||||||
0M (n=24) | 12M (n=22) | Within-Arm Difference 0–12M p-value | 0M (n=22) | 12M (n=20) | Within-Arm Difference 0–12M p-value | |
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Health Behaviors | ||||||
Vegetable & Fruit Intake (EATS)b | ||||||
- Servings/day | 1.34(0.25) | 2.25(0.45) | 0.02 | 1.22(0.17) | 1.12(0.21) | 0.77 |
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Physical Activity (PA) | ||||||
Moderate PA (GTLEQ) (min/week) | 59.77(20.47) | 105.00(32.76) | 0.26 | 22.50(7.18) | 52.14(30.64) | 0.47 |
Accelerometer MET hours/weekc | 63.18(9.45) | 62.82(10.62) | 0.42 | 59.05(10.41) | 42.76(11.87) | 0.50 |
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Anthropometric Measures | ||||||
| ||||||
Weight (kg) | 77.70(3.58) | 75.04(3.45) | 0.13 | 78.36(3.82) | 80.95(4.59) | 0.55 |
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BMI (kg/m2) | 28.53(1.04) | 27.82(1.19) | 0.17 | 27.99(0.97) | 28.49(1.18) | 0.57 |
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Waist Circumference (cm) | 92.92(2.86) | 95.22(2.67) | <0.01 | 91.89(3.08) | 99.85(3.79) | <0.01 |
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Physical Performance Measuresd | ||||||
| ||||||
2-Minute Step Test (steps) | 72.08(4.76) | 93.61(4.08) | <0.01 | 74.38(6.24) | 88.42(8.07) | 0.06 |
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Timed 8-foot Walk (seconds) | 3.55(0.28) | 2.54(0.16) | 0.04 | 3.68(0.30) | 3.07(0.37) | 0.01 |
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8-foot Get-Up & Go (seconds) | 8.19(0.32) | 6.92(0.41) | 0.003 | 8.49(0.52) | 6.87(0.60) | 0.03 |
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30-second Chair Stand (number of rises) | 12.46(0.57) | 13.74(0.77) | 0.19 | 14.14(1.19) | 13.94(1.23) | 0.66 |
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Chair Sit & Reach (inches) | 0.87(0.52) | 0.84(0.82) | 0.95 | −1.26(0.94) | −0.81(0.95) | 0.98 |
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Back Scratch (inches) | −1.49(1.21) | −2.80(0.97) | 0.37 | −3.28(1.25) | −3.40(1.36) | 0.89 |
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Arm Curl (number of curls) | 18.00(0.84) | 18.40(1.05) | 0.42 | 17.38(1.13) | 20.11(1.55) | 0.08 |
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Hand Grip Strength (kg) | 25.98(2.13) | 25.20(1.83) | 0.63 | 26.00(1.87) | 27.65(2.26) | 0.21 |
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Balance Testing (seconds) | 5.58(0.25) | 5.95(0.05) | 0.15 | 5.28(0.30) | 5.42(0.33) | 0.16 |
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Biomarkers | ||||||
| ||||||
Salivary Cortisol (μg/dL) | 0.64(0.32) | 0.04(0.02) | 0.21 | 0.41(0.18) | 0.24(0.20) | 0.82 |
| ||||||
Fingernail Cortisol (ng/g)f | 0.069(0.025) | 0.062(0.051) | 0.41 | 0.102(0.054) | 0.102(0.065) | 0.96 |
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Toenail Cortisol (ng/g)f | 0.022(0.073) | 0.015(0.007) | 0.39 | 0.040(0.060) | 0.149(0.065) | 0.64 |
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Telomerase | 0.014(0.007) | 0.001(0.001) | 0.05 | 0.014(0.006) | 0.012(0.007) | 0.81 |
| ||||||
Interleukin (IL)-6 (pg/mL) | 1.77(0.52) | 1.12(0.10) | 0.24 | 1.59(0.31) | 1.46(0.23) | 0.52 |
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Psychosocial Measurese | ||||||
| ||||||
Perceived Stress | 13.14(1.33) | 13.67(1.52) | 0.80 | 11.37(1.91) | 11.46(1.90) | 0.39 |
| ||||||
Reassurance of Worth* | 12.95(0.36) | 13.44(0.40) | 0.18 | 13.53(0.48) | 13.08(0.59) | 0.07 |
| ||||||
Quality of Life (SF-36)12 | ||||||
Physical Summary Score * | 72.45(2.73) | 66.14(3.91) | 0.29 | 67.69(3.07) | 74.67(3.76) | 0.07 |
- Physical functioning | 73.48(3.45) | 75.00(5.00) | 0.36 | 72.86(4.09) | 77.65(3.84) | 0.31 |
- Physical role limitations ** | 71.74(4.34) | 63.99(6.91) | 0.22 | 64.58(5.07) | 79.41(5.56) | 0.01 |
- Pain ** | 76.30(3.80) | 64.40(5.34) | 0.02 | 66.43(4.95) | 77.50(5.28) | 0.05 |
- General Health | 68.26(3.15) | 66.14(3.92) | 0.89 | 66.90(4.02) | 64.12(4.91) | 0.19 |
Mental Health Score* | 75.46(2.86) | 74.01(4.76) | 0.66 | 68.80(4.42) | 75.95(4.00) | 0.01 |
- Emotional well-being | 76.74(3.09) | 80.00(3.61) | 0.53 | 74.52(4.85) | 76.47(5.40) | 0.35 |
- Emotional role limitations | 81.88(4.37) | 79.76(5.99) | 0.84 | 76.59(5.65) | 87.25(4.35) | 0.03 |
- Vitality* | 58.42(2.80) | 55.95(4.85) | 0.46 | 51.49(3.73) | 58.46(3.90) | 0.02 |
- Social functioning | 84.78(3.24) | 80.36(6.49) | 0.44 | 72.62(6.08) | 81.62(5.04) | 0.07 |
Measures described in Methods and Table 1.
p<0.06;
MET-hours Metabolic Equivalent of Task (MET) is a physiological measure expressing the energy cost of physical activities, as compared to the reference metabolic rate of 3.5 ml O2·kg−1·min−1, (estimated oxygen consumption at rest). Higher levels indicate more physical activity.
For physical performance measures, higher values are favorable for the 2-minute step test, 30-second chair stand, arm curl, hand grip strength and balance testing, for all other measures lower values are considered more favorable.
For psychosocial measures, higher values are favorable for reassuance of worth (maximal score=16; minimal score=4) and the SF-36 (maximal score=100; minimal score=0), and lower values are favorable for perceived stress (maximal score=16; minimal score=0)
l nmol/g (0.3625 ng/g)
Between-arm difference of p<0.05;
Between-arm difference of p<0.01