Table 1.
Demographic characteristics of measles cases and age-matched controls aged 0–7 months stratified by geographic area—China, 2012–2013.
| Eastern region, N (%) |
Central/western region, N (%) |
Total, N (%) |
||||
|---|---|---|---|---|---|---|
| Cases (n = 360) | Controls (n = 1046) | Cases (n = 470) | Controls (n = 1257) | Cases (n = 830) | Controls (n = 2303) | |
| Sex (male) | 242 (67) | 572 (55) | 313 (67) | 683 (54) | 555 (67) | 1255 (54) |
| Age (months) | ||||||
| 0 | 2 (1) | 14 (1) | 1 (0) | 26 (2) | 3 (0) | 40 (2) |
| 1 | 1 (0) | 59 (6) | 6 (1) | 99 (8) | 7 (1) | 158 (7) |
| 2 | 7 (2) | 94 (9) | 11 (2) | 132 (11) | 18 (2) | 226 (10) |
| 3 | 12 (3) | 122 (12) | 32 (7) | 179 (14) | 44 (5) | 301 (13) |
| 4 | 42 (12) | 157 (15) | 59 (13) | 179 (14) | 101 (12) | 336 (15) |
| 5 | 69 (19) | 189 (18) | 82 (17) | 201 (16) | 151 (18) | 390 (17) |
| 6 | 105 (29) | 206 (20) | 142 (30) | 222 (18) | 247 (30) | 428 (19) |
| 7 | 122 (34) | 205 (20) | 137 (29) | 219 (17) | 259 (31) | 424 (18) |
| Age group | ||||||
| 0–4 months | 64 (18) | 446(43) | 109 (23) | 615 (49) | 173 (21) | 1061 (46) |
| 5–7 months | 296 (82) | 600 (57) | 361 (77) | 642 (51) | 657 (79) | 1242 (54) |
| Vaccination card (yes) | 356 (99) | 1036 (99) | 460 (98) | 1218 (97) | 816 (98) | 2254 (98) |
| Received all eligible doses (yes) | 196 (58) | 847 (85) | 226 (56) | 909 (83) | 422 (57) | 1756 (84) |
| Mothers education | ||||||
| ≤Primary school | 27 (8) | 71 (7) | 99 (21) | 245 (20) | 126 (15) | 316 (14) |
| Middle school | 292 (82) | 821 (79) | 343 (74) | 941 (75) | 635 (78) | 1762 (77) |
| ≥College | 36 (10) | 150 (14) | 22 (5) | 65 (5) | 58 (7) | 215 (9) |
| Fathers education | ||||||
| ≤Primary school | 19 (5) | 37 (4) | 81 (17) | 170 (14) | 100 (12) | 207 (9) |
| Middle school | 280 (79) | 820 (79) | 360 (77) | 1003 (80) | 640 (78) | 1823 (80) |
| ≥College | 57 (16) | 184 (18) | 25 (5) | 76 (6) | 82 (10) | 260 (11) |
| Type of house | ||||||
| Multistory building | 191 (53) | 550 (53) | 172 (37) | 447 (36) | 363 (44) | 997 (43) |
| Single-story house | 156 (43) | 481 (46) | 281 (60) | 773 (62) | 437 (53) | 1254 (55) |
| Other | 12 (3) | 15 (1) | 13 (3) | 31 (2) | 25 (3) | 46 (2) |
| Number of siblings | ||||||
| 0 | 248 (69) | 732 (70) | 248 (53) | 683 (54) | 496 (60) | 1415 (62) |
| 1 | 96 (27) | 274 (26) | 170 (36) | 459 (37) | 266 (32) | 733 (32) |
| ≥2 | 14 (4) | 37 (4) | 51 (11) | 114 (9) | 65 (8) | 151 (7) |
| Primary caretaker | ||||||
| Parents | 322 (90) | 897 (86) | 433 (93) | 1151 (92) | 755 (91) | 2048 (89) |
| Other | 36 (10) | 147 (14) | 35 (7) | 105 (8) | 71 (9) | 252 (11) |
| Change in residence in child | ||||||
| Yes | 49 (14) | 74 (7) | 35 (8) | 38 (3) | 84 (10) | 112 (5) |
| History of family migration | ||||||
| From different province | 75 (21) | 173 (17) | 12 (3) | 40 (3) | 87 (11) | 213 (9) |
| From different prefecture | 92 (26) | 196 (19) | 40 (9) | 87 (7) | 132 (16) | 283 (12) |
| From different county | 104 (29) | 219 (21) | 60 (13) | 126 (10) | 164 (20) | 345 (15) |
| Non-vaccination hospital visit in last 8–21 days (yes) | 172 (48) | 64 (6) | 201 (43) | 60 (5) | 373 (45) | 124 (5) |
| Type of visit | ||||||
| Outpatient: 8–21 days | 98 (27) | 53 (5) | 78 (17) | 50 (4) | 176 (21) | 103 (5) |
| Inpatient: 8–21 days | 74 (21) | 11 (1) | 123 (26) | 10 (1) | 197 (24) | 21 (1) |
| No visit | 185 (52) | 973 (94) | 264 (57) | 1182 (95) | 449 (55) | 2155 (95) |
Note: Discrepancies between sum of cases or controls listed for a variable and the total number of cases or controls reflect unknown or missing data, which were ≤2% for each variable and therefore omitted from this table. Exception: Data for “received all eligible doses” is missing in 11% of cases and 9% of controls.