Table 1. Descriptive statistics of the study population.
The study population includes susceptible children under the age of vaccination eligibility and residing in the households included in the study. The early period was 17 January 2021 to 28 March 2021. The late period was 11 July 2021 to 30 September 2021. NA, not applicable.
| Characteristic | Early period (N = 400,733) | Late period (N = 181,307) |
| Median age (IQR) | 6 (3, 9) | 5 (2, 7) |
| Median household size (IQR) | 5 (4, 6) | 5 (4, 5) |
| Age (N, %) | ||
| 0-2 | 81,672 (20%) | 47,710 (26%) |
| 3-6 | 135,230 (34%) | 75,278 (42%) |
| 7-12* | 149,917 (37%) | 58,319 (32%) |
| 13-15 | 33,914 (8.5%) | NA |
| Sex (N, %) | ||
| Female | 194,272 (48%) | 87,913 (48%) |
| Male | 206,461 (52%) | 93,394 (52%) |
| Population group (N, %) | ||
| Arabs | 101,557 (25%) | 32,484 (18%) |
| General | 277,444 (69%) | 140,222 (77%) |
| Ultra-Orthodox Jewish | 21,732 (5.4%) | 8,601 (4.7%) |
| Socioeconomic status (N, %) | ||
| Low | 223,108 (56%) | 88,023 (49%) |
| Medium | 162,833 (41%) | 87,380 (48%) |
| High | 14,792 (3.7%) | 5,904 (3.3%) |
| Household size (N, %) | ||
| 3 | 20,127 (5.0%) | 11,936 (6.6%) |
| 4 | 107,549 (27%) | 63,866 (35%) |
| 5 | 157,379 (39%) | 73,150 (40%) |
| 6 | 80,423 (20%) | 24,878 (14%) |
| 7 | 35,255 (8.8%) | 7,477 (4.1%) |
| Residence type (N, %) | ||
| Large city | 127,887 (32%) | 62,991 (35%) |
| Small city | 149,260 (37%) | 67,702 (37%) |
| Town | 76,764 (19%) | 28,817 (16%) |
| Rural | 31,555 (7.9%) | 13,888 (7.7%) |
| Kibbutz (communal residence) | 15,267 (3.8%) | 7,909 (4.4%) |
| Chronic conditions (N, %) | ||
| Obesity | 24,780 (6.2%) | 9,524 (5.3%) |
| Cardiovascular conditions | 1,833 (0.5%) | 460 (0.3%) |
| Pulmonary disease | 47,823 (12%) | 18,779 (10%) |
| Type 2 diabetes | 1,833 (0.5%) | 636 (0.4%) |
| Hypertension | 619 (0.2%) | 238 (0.1%) |
| Active malignancy | 240 (<0.1%) | 135 (<0.1%) |
*The late period includes children up to age 11.