Table 2.
Predictors of “excess” RMR.
| Model 1: Anthropom (n=1155) |
Model 2: Weather (n=1139) |
Model 3: Medical (n=702) |
Model 4: Full (n=691) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| Parameter | Est. | β | p | Est. | β | p | Est. | β | p | Est. | Β | p |
| Intercept | −697.1 | 0.00 | 0.0053 | 693.5 | 0.00 | <.0001 | −280.5 | 0.00 | 0.0508 | −927.9 | 0.00 | 0.0017 |
| Sex (1=male) | 188.1 | 0.29 | <.0001 | 115.6 | 0.18 | <.0001 | 108.9 | 0.17 | <.0001 | 178.3 | 0.28 | <.0001 |
| Age (yrs) | −1.2 | −0.05 | 0.0933 | |||||||||
| Time (<8:00 vs. 8-12pm) | 88.4 | 0.05 | 0.087 | 81.6 | 0.04 | 0.1241 | 62.9 | 0.03 | 0.3342 | |||
| [12-2pm vs. 8-12pm) | 60.2 | 0.04 | 0.1661 | 68.1 | 0.04 | 0.1306 | 123.3 | 0.09 | 0.0178 | |||
| [2-5pm vs. 8-12pm) | 63.3 | 0.09 | 0.0026 | 53.5 | 0.07 | 0.014 | 58.8 | 0.08 | 0.0311 | |||
| (>5pm vs. 8-12pm) | 39.0 | 0.02 | 0.4516 | −31.7 | −0.02 | 0.4914 | 40.5 | 0.03 | 0.5074 | |||
| Hrs ago ate (0-4 vs. 5-9) | 89.1 | 0.11 | 0.0954 | 134.3 | 0.17 | 0.0161 | 146.6 | 0.19 | 0.0257 | |||
| (10+ vs. 5-9) | 132.5 | 0.16 | 0.0179 | 115.9 | 0.14 | 0.0547 | 128.4 | 0.15 | 0.0598 | |||
| Season (Dry vs. wet) | 128.8 | 0.20 | <.0001 | 110.7 | 0.17 | 0.0002 | 136.7 | 0.21 | 0.0002 | 122.0 | 0.19 | 0.0007 |
| (Other vs. wet) | 76.9 | 0.11 | 0.0061 | 40.8 | 0.06 | 0.1721 | 77.2 | 0.12 | 0.0347 | 85.4 | 0.13 | 0.0162 |
| Fat-free mass (kg) | −8.7 | −0.20 | 0.0002 | |||||||||
| Fat mass (kg) | 22.7 | 0.42 | <.0001 | 12.7 | 0.24 | <.0001 | ||||||
| Height (cm) | 6.4 | 0.16 | 0.0002 | 6.5 | 0.17 | 0.0017 | ||||||
| Weight (kg) | −9.2 | −0.27 | <.0001 | . | ||||||||
| Mean Daily Temp (°C) | −5.3 | −0.11 | 0.0006 | |||||||||
| Mean Daily Humidity (%) | −2.1 | −0.07 | 0.0153 | |||||||||
| Daily Precipitation (mm) | −89.7 | −0.05 | 0.1123 | −144.2 | −0.08 | 0.0294 | ||||||
| Hemoglobin (mg/L) | 16.0 | 0.07 | 0.098 | |||||||||
| WBC (×103 cells/uL) | 8.8 | 0.08 | 0.0363 | 10.1 | 0.09 | 0.0142 | ||||||
| Helminths (1=yes) | 150.5 | 0.14 | 0.0002 | 131.3 | 0.13 | 0.0008 | ||||||
| Back pains (1=yes) | 47.5 | 0.07 | 0.0547 | 50.7 | 0.08 | 0.0347 | ||||||
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| Model Fit | Adj R2=0.1322 | Adj R2=0.1139 | Adj R2=0.1040 | Adj R2=0.1732 | ||||||||
Note: Excess is defined as measured RMR – estimated RMR from Cunningham prediction equation. Models consider variables on anthropometrics, weather, infection/ medical status, with age, sex, time since eaten, and time of day as controls. Each model employs stepwise selection method with AIC selection criterion. Additional variables in the models that were excluded from the stepwise selection include fat-free mass, fever, giardia (1=yes), respiratory ailment (1=yes), gastrointestinal ailment (1=yes). “est.” refers to unstandardized parameter estimate; β is the standardized regression coefficient