## 3 Results
### Combined Perceived Control Versus Building Characteristics
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Characteristics** & **n1/N1** & **n2/N2** & **OR (CI 95\%)** & \(p\)**-Value** \\ \hline
**General building characteristics** & & & & \\ Location & & & & \\ Mixed industrial/residential area (vs. industrial area) & 696/7441 & 14/167 & 1.68 (0.76–3.69) & 0.199 \\ Commercial area (vs. industrial area) & 789/7441 & 18/167 & 0.95 (0.46–1.95) & 0.883 \\ Mixed commercial/residential area (vs. industrial area) & 2279/7441 & 50/167 & 1.71 (0.94–3.09) & 0.076 \\ City center, densely packed housing (vs. industrial area) & 1344/7441 & 30/167 & 1.35 (0.7–2.63) & 0.374 \\ Town, with no or small gardens (vs. industrial area) & 328/7441 & 8/167 & **3.42 (1.33–7.75)** & **0.010** \\ Suburban, with larger gardens (vs. industrial area) & 864/7441 & 22/167 & **3.88 (1.92–7.82)** & **<0.001** \\ Village in a rural area (vs. industrial area) & 24/7441 & 11/167 & 0.82 (0.09–7.46) & 0.859 \\ Rural area with no or few other homes nearby (vs. industrial area) & 192/7441 & 6/167 & 1.27 (0.45–3.57) & 0.646 \\ Facades with adjacent buildings & & & & \\
2 facades (vs. 1 facade) & 1932/4664 & 37/102 & **0.6 (0.38–0.95)** & **0.030** \\
3 facades (vs. 1 facade) & 288/4664 & 9/102 & 1.48 (0.68–3.25) & 0.322 \\ Density of nearby obstructions & & & & \\ Moderately dense (vs. very dense) & 2610/7441 & 58/167 & 1.31 (0.69–2.5) & 0.407 \\ Few buildings (vs. very dense) & 2992/7441 & 58/167 & 1.43 (0.74–2.76) & 0.285 \\ Free standing (vs. very dense) & 1031/7441 & 26/167 & 1.95 (0.93–4.09) & 0.076 \\ Neighboring buildings with glass facades or & & & & \\ light-colored facades causing glare & & & & \\ Yes, in summer (vs. No) & 215/7441 & 4/167 & 0.4 (0.13–1.27) & 0.120 \\ A little in summer (vs. No) & 654/7441 & 12/167 & **0.5 (0.25–1)** & **0.049** \\ Yes, in winter (vs. No) & 102/7441 & 2/167 & 0.35 (0.07–1.71) & 0.195 \\ A little in winter (vs. No) & 217/7441 & 5/167 & **0.24 (0.09–0.68)** & **0.007** \\ Maximum number of occupants in the building & & & & \\ Between 101 and 250 (vs. \(\leq\)100) & 2288/7260 & 56/163 & 0.79 (0.52–1.2) & 0.272 \\ \(\geq\)251 (vs. \(\leq\)100) & 3544/7260 & 51/163 & **0.39 (0.25–0.61)** & **<0.001** \\ Total floor area (m\({}^{2}\)) & & & & \\ Between 1441 and 3210 (\(\leq\)1440) & 2300/7234 & 53/160 & 0.78 (0.49–1.24) & 0.295 \\ \(\geq\)3211 (\(\leq\)1440) & 3341/7234 & 54/160 & **0.51 (0.31–0.83)** & **0.007** \\ Activities in the building besides office work & & & & \\ Underground car park (vs. No) & 2678/7441 & 44/167 & 0.73 (0.46–1.16) & 0.178 \\ Print shop (vs. No) & 428/7441 & 7/167 & 1.92 (0.78–4.73) & 0.156 \\ Pesticide treatment plan (vs. No) & 7025/7441 & 99/164 & **0.59 (0.39–0.88)** & **0.010** \\ Documented complaints procedure for occupants (vs. No) & 5112/7349 & 99/165 & **0.41 (0.28–0.61)** & **<0.001** \\ Smoking permission & & & & \\ Only outside the building (vs. No) & 3916/7441 & 88/167 & **0.55 (0.33–0.93)** & **0.026** \\ Only in separately ventilated rooms (vs. No) & 973/7441 & 13/167 & **0.29 (0.13–0.63)** & **0.002** \\ Percentage of office furniture is less than one year old and made of MDF & 7025/7441 & 162/162 & 0.99 (0.99–1) & 0.200 \\ Portable air cleaner (vs. No) & 225/7441 & 5/167 & **0.33 (0.12–0.93)** & **0.035** \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Relations between combined overall perceived control and building characteristicsAll individual and building characteristics from Models 2 and 3 were imported to Model 4; the relevant results are presented in Table 5. The variance between buildings was equal to 0.14 in Model 4. PCV shows that 88% of the initial variance in overall perceived control was explained by the included variables. Buildings with larger total floor areas were positively associated with perceived overall control (OR 1.99, 95% CI: 1.22-3.25). The workspace floor was also positively associated with control perception (OR 1.06, 95% CI: 1.02-1.10).