Table 1.
Sociodemographic characteristics of patients enrolled with influenza-like illness (ILI) in southern Sri Lanka, March–November 2013*
| Characteristic | Frequency (%) or median (IQR) | OR (95% CI) | P value | |
|---|---|---|---|---|
| Influenza positive (N = 147) | Influenza negative (N = 159) | |||
| Age, children 1–18 years | 9.4 (5.8–12.2) | 5.5 (3.6–7.9) | − | < 0.001 |
| Age, adults ≥ 18 years | 42.4 (29.4–52.4) | 41.9 (24.3–56.7) | − | 0.68 |
| Male | 87 (59.2%) | 82 (51.6%) | 1.36 (0.84–2.20) | 0.18 |
| Hometown | ||||
| Galle | 32 (21.8%) | 37 (23.3%) | 0.92 (0.52–1.63) | 0.75 |
| Poddala | 14 (9.5%) | 25 (15.7%) | 0.56 (0.26–1.19) | 0.10 |
| Wanduramba | 8 (5.4%) | 6 (3.8%) | 1.47 (0.43–5.26) | 0.49 |
| Akmeemana | 12 (8.2%) | 10 (6.3%) | 1.32 (0.51–3.54) | 0.53 |
| Distance to THK (km) | 5 (3–15) | 5 (3–15) | − | 0.72 |
| Time to THK (minutes) | 30 (15–50) | 30 (15–60) | − | 0.81 |
| Occupation (adults) | ||||
| Housewife | 15 (21.7%) | 14 (20.0%) | 1.11 (0.45–2.75) | 0.80 |
| Merchant | 14 (20.3%) | 16 (22.9%) | 0.86 (0.35–2.09) | 0.71 |
| Laborer | 10 (14.5%) | 12 (17.2%) | 0.82 (0.29–2.26) | 0.67 |
| Farmer | 5 (7.3%) | 5 (7.1%) | 1.02 (0.22–4.64) | 0.98 |
| Unemployed | 6 (8.7%) | 9 (12.9%) | 0.65 (0.18–2.18) | 0.43 |
| Education (adults) | ||||
| ≥ 12th Grade | 21 (30.4%) | 19 (27.1%) | 1.17 (0.53–2.62) | 0.67 |
| Sick contact in past month (adults) | 37 (53.6%) | 18 (25.7%) | 3.34 (1.54–7.30) | < 0.001 |
| Travel—yes/no | 21 (14.3%) | 32 (20.1%) | 0.66 (0.34–1.26) | 0.18 |
| Rupees spent for travel related to illness | 70 (36–120) | 60 (32–120) | − | 0.86 |
| Days missed | ||||
| Work (adults) | 0 (0–1) | 0 (0–1) | 0.66 | |
| School (children) | 1 (1–2) | 1 (0–1) | 0.005 | |
CI = confidence intervals; IQR = interquartile range; OR = odds ratio; THK = Teaching Hospital Karapitiya.
*
Influenza-positive and influenza-negative patients, as determined by rapid influenza testing, were compared. Number (%) and odds ratios (OR) with 95% confidence intervals (CI) and P values are listed for categorical variables, and medians with interquartile range and P values using the Kruskal–Wallis test are listed for continuous variables. P values listed in bold are significant at < 0.05.