Table 2.
Bivariate analyses of school and classroom characteristics by transmission risk from child-to-child with mask wearing.
| Variable | All schools | High transmission risk schools (>median rate) | Low transmission risk schools (≤median rate) | P-value |
|---|---|---|---|---|
| Total, n (%) | 19 (100) | 9 (47.4) | 10 (53.6) | |
| Sampling season, n (%) | ||||
| Heating | 19 (100) | 9 (47.4) | 10 (53.6) | |
| Cooling | 15 (78.9) | 7 (46.7) | 8 (53.3) | |
| Both | 15 (78.9) | 7 (46.7) | 8 (53.3) | |
| Location, n (%) | ||||
| Bronx | 4 (21.0) | 0 (0) | 4 (100) | 0.056a |
| Brooklyn | 5 (26.3) | 2 (33.3) | 3 (66.7) | |
| Manhattan | 3 (15.8) | 3 (100) | 0 (0) | |
| Queens | 5 (26.3) | 2 (33.3) | 3 (66.7) | |
| Staten Island | 2 (10.5) | 2 (100) | 0 (0) | |
| School has mechanical ventilation, n (%) | ||||
| Yes | 7 (36.8) | 3 (42.8) | 4 (57.2) | 1.000a |
| No | 12 (63.2) | 6 (50.0) | 6 (50.0) | |
| Age of school, n (%) | ||||
| ≥100 years old | 5 (26.3) | 1 (20.0) | 4 (80.0) | 0.364a |
| 50–99 years | 9 (47.3) | 6 (66.7) | 3 (33.3) | |
| <50 years old | 5 (26.3) | 2 (40.0) | 3 (60.0) | |
| Median household income ($) in neighborhood school serves, n (%) | ||||
| 20K- ≤40K | 9 (47.3) | 4 (44.4) | 5 (65.6) | 0.182a |
| >40K- ≤ 80K | 5 (26.3) | 1 (20.0) | 4 (80.0) | |
| >80K | 5 (26.3) | 4 (80.0) | 1 (20.0) | |
| Total classroom, n (%) | 155 (100) | 74 (47.7) | 81 (52.3) | |
| Classrooms sampled by season, n (%) | ||||
| Heating | 86 (55.5) | 40 (46.5) | 46 (53.5) | |
| Cooling | 69 (44.5) | 34 (49.3) | 35 (50.7) | |
| Both | 54 (34.8) | 26 (48.1) | 28 (51.9) | |
| Classroom size (m2) | ||||
| Mean (SD) | 57 (14) | 55 (16) | 58 (16) | 0.640b |
| Median (Range) | 56 (10–100) | 56 (10–100) | 56 (41–100) | |
| Average number of students per class | ||||
| Mean (SD) | 23 (8.3) | 23 (9.5) | 23 (7.2) | 0.821b |
| Median (Range) | 24 (4–50) | 26 (4–50) | 24 (8–32) | |
| Classrooms with no windows or broken windows, n (%) | ||||
| Yes | 18 (17.8) | 11 (61.1) | 7 (38.9) | 0.298a |
| No | 83 (81.2) | 37 (44.6) | 46 (55.4) | |
a
Fisher's exact test.
b
Wilcoxon signed-rank test.