Table 5.
Linear regression analysis of personal history of water carriage on Factor 1 (axial compression) and Factor 2 (soft tissue strain)
| Factor correlated pain locations | Predictor variable | N | B | L95%CI | U05%CI | P-value |
|---|---|---|---|---|---|---|
| Factor 1: Axial compression |
No history of water carriage |
364 |
0 |
0.000045 |
||
| Previous history of water carriage |
159 |
0.21 |
0.01 |
0.42 |
||
| Currently carries water |
474 |
0.30 |
0.17 |
0.43 |
||
| Currently carries water – no head loading |
214 |
0 |
0.034 |
|||
| Currently carries water – head loading* |
260 |
0.36 |
0.03 |
0.70 |
||
| Factor 2: Soft tissue strain |
No history of water carriage |
364 |
0 |
0.023 |
||
| Previous history of water carriage |
159 |
-0.03 |
-0.25 |
0.19 |
||
| Currently carries water |
474 |
-0.18 |
-0.32 |
-0.04 |
||
| Currently carries water – no head loading |
214 |
0 |
0.64 |
|||
| Currently carries water – head loading1 | 260 | -0.07 | -0.35 | 0.22 |
B – linear regression coefficient, L95% CI – lower 95% confidence interval; U95% CI – upper 95% confidence interval
*Subgroup “currently carries water – head loading” only contains participants from South Africa and Ghana, as no-one in Vietnam carried water by head loading.