Skip to main content

Table 2 Experiment 2: Comparison of ventilation using CO2 data loggers between different typologies of housing

From: Measuring ventilation in different typologies of rural Gambian houses: a pilot experimental study

Typology comparison Method
Method B: Artificial CO2 elevation and decay (n = 5) Method C: Natural CO2 elevation and decay* (n = 6) Method D: Natural CO2 rise (n = 6)
Control house, mean ACH m3/h (95% CI) Test house, mean ACH m3/h (95% CI) Difference, mean ACH m3/h (95% CI) t p Control house, mean ACH m3/h (95% CI) Test House, mean ACH m3/h (95% CI) Difference, mean ACH m3/h (95% CI) t p Control house, mean ACH m3/h (95% CI) Test house, mean ACH m3/h (95% CI) Difference, mean ACH m3/h (95% CI) t p
− 38.1 (− 42.2, − 34.0) − 132.2 (− 182.6, − 81.8) 94.1 (43.0, 145.1) 5.112 0.007 − 11.3 (− 23.4, − 0.8) − 31.6 (− 44.5, 18.7) 20.3 (4.4, 36.2) 3.280 0.022 13.2 (9.4, 17.0) 0.1 (− 2.3− 2.4) 13.1 (11.3, 15.0) 18.071 < 0.001
− 22.0 (− 33.0, − 13.0) − 23.7 (− 34.2, − 13.1) 1.6 (− 11.3, 14.6) 0.347 0.746 − 12.4 (− 16.9, − 7.8) − 8.0 (− 15.7, − 0.3) − 4.3 (− 13.3, 4.7) − 1.236 0.271 14.1 (10.2, 18.0) 11.1 (7.2, 14.9) 3.1 (− 0.2, 6.4) 2.396 0.062
− 12.2 (− 33.1, 8.6) − 120.2 (− 156.9, − 83.6) 108.0 (55.2, 160.8) 5.681 0.005 − 7.6 (− 12.7, − 2.6) − 42.2 (− 55.8, − 28.5) 34.5 (20.7, 48.4) 6.405 0.001 14.7 (12.9, 16.6) 6.1 (4.2, 8.1) 8.6 (6.2, 11.0) 9.317 < 0.001
− 24.2 (− 42.6, − 5.8) − 151.5 (− 202.1, − 100.9) 127.3 (74.6, 180.1) 6.699 0.003 − 5.8 (− 15.0, 3.4) − 36.2 (− 49.0, − 23.4) 30.4 (13.3, 47.6) 4.556 0.006 13.3 (12.1, 14.5) − 1.3 (− 4.2, 1.6) 14.6 (11.6− 17.6) 12.349 < 0.001
  1. ACH air exchange per hour, CI  confidence intervals
  2. * First 15 min after human subjects have entered the house