Table 4: Percent of light reduced over oxygen hood under daytime and nighttime conditions of all cover types and differences in light reduction between covers.

CoverDayNight
MeanSDRange MeanSDRange

Crochet1092.602.0589–951071.5613.3853–94
Quilt987.209.3175–99982.0410.8468–95
Flannel388.316.5581–92385.778.1276–90
Receiving blanket*161.56157.69
Commercial covers±298.910.4098-99295.390.3495.15–95.63

Comparison not available because only one receiving blanket was tested, and no mean is available.
Crochet versus quilt: daytime: , ; nighttime: , .
Crochet versus flannel: daytime: , ; nighttime: , .
±Crochet versus commercial: daytime: . ; nighttime: , .