Prebronchodilator lung function parameters for participants with grade A–C spirometry, including the CAPS subgroup
| Participants with A–C spirometry N=522 | CAPS intervention arm N=167 | CAPS control arm N=133 | Intervention versus control * | |
| FEV1 z-score, mean (SD) | −0.48 (0.93) | −0.41 (0.92) | −0.60 (0.97) | P=0.10 |
| FVC z-score, mean (SD) | −0.30 (0.96) | −0.22 (0.97) | −0.44 (0.98) | P=0.05 |
| FEV1/FVC z-score, mean (SD) | −0.38 (0.90) | −0.40 (0.91) | −0.34 (0.93) | P=0.57 |
| FVC<LLN, n (%) | 37/522 (7.1%) | 11/167 (6.6%) | 12/133 (9.0%) | P=0.57 |
| Obstructive spirometry FEV1/FVC<LLN, n (%) | 33/522 (6.3%) | 11/167 (6.6%) | 10/133 (7.5%) | P=0.93 |
| Abnormal spirometry (low FVC, obstruction, mixed), n (%) | 68/522† (13.0%) | 21/167‡ (12.6%) | 22/133 (16.5%) | P=0.42 |
*Comparison of means using Student’s t-test; comparison of proportions using Pearson’s χ2 test.
†Mixed pattern in two participants.
‡Mixed pattern in one participant.
CAPS, Cooking and Pneumonia Study; FEV1, forced expiratory volume in one second; FVC, forced vital capacity.