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General characteristics of measurement target school cafeterias by school level
| School level(N) | Average number of service meals per worker | location(N) | Ventilation condition(N) |
|---|---|---|---|
| Elementary (9) | 91 | Ground (7) | Good (5) |
| Underground (2) | Moderate (3) | ||
| Other (0) | Bad (1) | ||
| Middle (8) | 77 | Ground (5) | Good (2) |
| Underground (1) | Moderate (3) | ||
| Other (2) | Bad (3) | ||
| High (7) | 81 | Ground (5) | Good (3) |
| Underground (1) | Moderate (2) | ||
| Other (1) | Bad (2) |
