Table 1. Comparison of demographic characteristics and reported behaviors among participants of a survey of chikungunya virus seroprevalence among communities with (intervention) or without (non-intervention) autocidal gravid ovitraps (AGO traps) in Puerto Rico, November 2015–February 2016.
| Characteristics | Intervention community participants N = 175 n (column %) |
Non-intervention community participants N = 152 n (column %) |
P value* |
|---|---|---|---|
| Demographics | |||
| Age, median (range) | 55 (5–89) | 58 (6–86) | 0.0001† |
| Age group | |||
| 5–19 | 13 (7.4) | 10 (6.6) | <0.0001 |
| 20–49 | 50 (28.6) | 34 (22.4) | <0.0001 |
| 50+ | 112 (64.0) | 108 (71.1) | <0.0001 |
| Female sex‡ | 112 (50.5) | 93 (52.9) | <0.0001 |
| Years living in community, median (range) | 20 (0–70) | 24 (0–76) | 0.1076† |
| Employment status‡ | |||
| Unemployed | 45 (15.0) | 36 (16.0) | 0.7939 |
| Retired | 73 (21.1) | 68 (28.7) | 0.0123 |
| Working/In school | 56 (63.9) | 48 (55.3) | 0.0290 |
| Behaviors and mosquito activity | |||
| Weekly hours at home during daylight hours, median (range) | 63 (14–84) | 76 (0–84) | 0.0001† |
| Frequency of mosquito bites‡ | |||
| Never | 12 (4.2) | 6 (2.9) | 0.4705 |
| Rarely | 92 (54.5) | 52 (23.9) | <0.0001 |
| Weekly | 21 (11.0) | 23 (19.6) | 0.0268 |
| Daily | 46 (30.3) | 66 (53.6) | 0.0009 |
| Time of day when mosquitos bite‡ | |||
| Morning | 17 (5.4) | 30 (16.9) | 0.0005 |
| Daytime | 28 (12.1) | 45 (31.0) | 0.0007 |
| Evening | 88 (51.9) | 86 (50.3) | 0.7874 |
| Night | 68 (43.4) | 51 (35.9) | 0.2867 |
| Never | 13 (4.3) | 4 (1.6) | 0.0628 |
| Where bitten by mosquitos‡ | |||
| Home | 123 (70.7) | 127 (80.5) | 0.0244 |
| School or work | 5 (4.1) | 7 (11.4) | 0.0073 |
| Others’ homes inside my community | 11 (3.8) | 13 (5.7) | 0.2963 |
| Others’ homes outside my community | 17 (14.1) | 21 (13.6) | 0.9118 |
| Other places | 33 (20.8) | 21 (15.1) | 0.1205 |
| Mosquitos never bite me | 12 (4.1) | 3 (1.1) | 0.0224 |
| Frequency of use of mosquito repellent‡ | |||
| Never | 66 (39.8) | 48 (29.1) | 0.0882 |
| Daily | 15 (6.3) | 31 (23.7) | <0.0001 |
| Occasionally | 92 (53.9) | 73 (47.2) | 0.3543 |
| Frequency of sleeping under bed net‡ | |||
| Never | 171 (98.8) | 139 (91.1) | 0.0002 |
| Daily | 4 (1.2) | 13 (8.9) | 0.0002 |
Abbreviations: CHIKV = chikungunya virus; RR = relative risk; 95% CI = 95% confidence interval
*Chi-square test
†Wilcoxon Test for comparison between medians
‡Proportions shown are estimates for the community based on survey responses