Table 2.
Results of pneumonia surveillance system, compared to birth cohort
| Facility-based pneumonia surveillance system | DCHS Birth cohort15 | Comparison (comparing surveillance system to birth cohort) | |
|---|---|---|---|
| Incidence: episodes/child year | 0.20 (0.17–0.22) | 0.27 (0.23–0.32) | IRR 0.72 (0.58–0.89; p=0.002) |
| Admitted | 52/306 (17%) | 55/141 (39%) | RR 0.44 (0.32–0.60; p<0.001) |
| Severe pneumonia* | 56/306 (18%) | 32/141 (23%) | RR 0.81 (0.55–1.18; p=0.28) |
| Male gender | Pneumonia events in males: 194/306=63% | Events in males: 97/141 (69%) | RR 0.92 (0.80–1.06; p=0.27) |
| Symptoms | |||
| Fever | 87/306 (28%) | 78/141 (55%) | RR 0.51 (0.41–0.65; p<0.001) |
| Wheeze | 93/306 (30%) | 92/141 (65%) | RR 0.47 (0.38–0.57; p<0.001) |
| Lower chest indrawing | 82/306 (27%) | 81/141 (57%) | RR 0.47 (0.37–0.59; p<0.001) |
| Seasons | (n=254 in 1 calendar-year) | (n=141) | |
| Summer | 35 (14% | 14 (10%) | p=0.26 |
| Autumn | 71 (28%) | 39 (28%) | p=0.95 |
| Winter | 92 (36%) | 47 (33%) | p=0.56 |
| Spring | 56 (22%) | 41 (29%) | p=0.12 |
Bold typeface indicates statistically significant results.
*Criteria for severity as per revised 2014 WHO pneumonia criteria.
DCHS, Drakenstein Child Health Study; IRR, incidence rate ratio; RR, risk ratio.