Figure 4
The three line graphs are labeled “a subscript 1”, “a subscript 2”, and “a subscript 3”. In each graph, four curves are shown. A legend at the bottom left of each graph shows that the four curves represent four occupational groups: blue for “1”, red for “2”, green for “3”, and orange for “4”. In graph “a subscript 1”, the horizontal axis is labeled “S I” and ranges from 1.0 to 5.0 in increments of 0.5 units. The vertical axis is labeled “Estimated marginal mean of P I” and ranges from 0.00 to 5.00 in increments of 1.00. The blue curve starts at (2.5, 3.00) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.04). The red curve starts at (1.0, 3.00) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.24). The green curve starts at (2.5, 4.33) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.42). The orange curve starts at (2.0, 4.33) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.00). In graph “a subscript 2”, the horizontal axis is labeled “E C” and ranges from 1.0 to 5.0 in increments of 0.5 units. The vertical axis is labeled “Estimated marginal mean of P I” and ranges from 0.00 to 5.00 in increments of 1.00. The blue curve starts at (1.5, 1.83) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.22). The red curve starts at (1.0, 1.83) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.37). The green curve starts at (2.5, 2.67) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.00). The orange curve starts at (1.5, 2.17) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.08). In graph “a subscript 3”, the horizontal axis is labeled “F C” and ranges from 1.5 to 5.0 in increments of 0.5 units. The vertical axis is labeled “Estimated marginal mean of P I” and ranges from 0.00 to 5.00 in increments of 1.00. The blue curve starts at (2.5, 2.00) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.02). The red curve starts at (2.5, 3.33) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.29). The green curve starts at (1.5, 3.00) and passes through many points forming sharp peaks and troughs, ending at (5.0, 4.17). The orange curve starts at (2.5, 3.67) and passes through many points forming sharp peaks and troughs, ending at (5.0, 3.72). Note: All numerical data values are approximated.(a1-a3) Impact of interaction of occupation and SI, EC, and FC on PI