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. Author manuscript; available in PMC: 2019 Mar 12.
Published in final edited form as: Arch Pediatr Adolesc Med. 2011 Aug;165(8):741–748. doi: 10.1001/archpediatrics.2011.111

Table 4.

Differences in SFDs, Slowed-Activity Days, and Symptom-Free Nights During Past 2 Weeks by Group

Symptom Differencea in SFDs During Past 2 wk, Mean (SD) P Value
Daytime wheeze, cough, chest tightnessb
 Control group −0.24 (3.0) graphic file with name nihms-1015613-t0010.jpg
 Air cleaner group 1.06 (3.4) .09
 Air cleaner plus health coach group 1.63 (4.8)
Slowed-activity daysb
 Control group 0.25 (3.2) graphic file with name nihms-1015613-t0011.jpg
 Air cleaner group 2.24 (5.2) .12
 Air cleaner plus health coach group 1.32 (5.2)
Nocturnal wheeze, cough, chest tightnessb
 Control group −0.03 (4.3) graphic file with name nihms-1015613-t0012.jpg
 Air cleaner group 1.21 (4.5) .34
 Air cleaner plus health coach group 1.25 (3.9)

Abbreviation: SFDs, symptom-free days.

a

Indicates mean 6-month concentration minus the baseline concentration.

b

Analysis of variance was used to compare mean differences in SFDs.