Total caffeine, mg/day | Coffee caffeine, mg/day | Tea caffeine, mg/day | ||||||
---|---|---|---|---|---|---|---|---|
N (%) | median (IQR) | p-valuea | median (IQR) | p-valuea | median (IQR) | p-valuea | ||
Household income, NOK | Both partners < 300,000 | 18,703 (28) | 51 (20; 115) | < 0.05 | 3 (0; 57) | < 0.05 | 6 (0; 29) | < 0.05 |
One partner ≥ 300,000 | 27,716 (42) | 57 (23; 122) | 6 (0; 66) | 6 (1; 29) | ||||
Both partners ≥ 300,000 | 19,263 (29) | 68 (29; 128) | 13 (0; 85) | 6 (1; 40) | ||||
Missing | 1887 | 55 (21; 129) | 3 (0; 61) | 6 (0; 29) | ||||
Maternal education, years | ≤ 12 | 20,840 (32) | 58 (22; 131) | < 0.05 | 3 (0; 66) | < 0.05 | 3 (0; 17) | < 0.05 |
13–16 | 28,136 (43) | 55 (22; 115) | 7 (0; 63) | 6 (0; 29) | ||||
17+ | 17,157 (26) | 65 (28; 124) | 13 (0; 85) | 6 (3; 40) | ||||
Missing | 1436 | 60 (22; 127) | 7 (0; 69) | 6 (0; 29) | ||||
Marital statusb | Yes | 64,978 (96) | 58 (23; 122) | < 0.05 | 8 (0; 68) | 0.9 | 6 (1; 29) | < 0.05 |
No | 2591 (4) | 60 (22; 142) | 6 (0; 79) | 3 (0; 17) | ||||
Parity | 0 | 35,631 (53) | 48 (20; 102) | < 0.05 | 6 (0; 48) | < 0.05 | 6 (1; 29) | < 0.05 |
1 | 20,664 (31) | 68 (28; 137) | 8 (0; 85) | 6 (1; 40) | ||||
2 | 9080 (13) | 85 (33; 175) | 12 (0; 95) | 6 (1; 40) | ||||
3+ | 2150 (3) | 96 (38; 194) | 20 (0;170) | 6 (0; 40) | ||||
Missing | 44 | 50 (19; 130) | 9 (0; 92) | 6 (1; 29) | ||||
Maternal age, years | < 25 | 7712 (11) | 35 (15; 82) | < 0.05 | 0 (0; 13) | < 0.05 | 3 (0; 17) | < 0.05 |
25 to 29 | 22,969 (34) | 48 (20; 102) | 5 (0; 44) | 6 (1; 29) | ||||
30 to 34 | 28,699 (42) | 69 (28; 135) | 12 (0; 85) | 6 (1; 40) | ||||
> 34 | 8189 (12) | 92 (40; 180) | 28 (0; 129) | 6 (1; 40) | ||||
Alcohol consumption, units/week | No alcohol | 60,155 (89) | 54 (22; 115) | < 0.05 | 6 (0; 61) | < 0.05 | 6 (1; 29) | < 0.05 |
< 0.5 | 6214 (9) | 94 (45; 176) | 38 (5; 119) | 17 (3; 40) | ||||
> 0.5 | 1199 (2) | 128 (66; 218) | 76 (13; 173) | 17 (3; 40) | ||||
Smoking status | Daily | 3596 (5) | 157 (59; 258) | < 0.05 | 78 (0; 179) | < 0.05 | 3 (0; 17) | < 0.05 |
Occasionally | 1816 (3) | 110 (45; 201) | 44 (0; 170) | 3 (0; 17) | ||||
Never | 61,778 (92) | 55 (22; 113) | 6 (0; 61) | 6 (1; 29) | ||||
Missing | 379 | 65 (28; 130) | 12 (0; 75) | 6 (0; 40) | ||||
Nausea | No | 59,877 (89) | 61 (24; 126) | < 0.05 | 8 (0; 79) | < 0.05 | 6 (1; 29) | < 0.05 |
Yes | 7692 (11) | 45 (16; 99) | 0.1 (0; 21) | 6 (0; 29) | ||||
Folic acid supplementation | No | 37,454 (55) | 62 (24; 131) | < 0.05 | 7 (0; 82) | 0.86 | 6 (1; 29) | < 0.05 |
Yes | 30,115 (45) | 55 (22; 112) | 8 (0; 63) | 6 (1; 29) | ||||
Planned pregnancy | No | 12,994 (19) | 61 (23; 133) | < 0.05 | 7 (0; 83) | 0.57 | 6 (0; 29) | < 0.05 |
Yes | 54,575 (81) | 58 (23; 120) | 8 (0; 67) | 6 (1; 29) | ||||
Baby’s sex | Girl | 34,340 (51) | 59 (23; 124) | 0.13 | 7 (0; 69) | 0.98 | 6 (1; 29) | 0.88 |
Boy | 33,229 (49) | 58 (23; 122) | 8 (0; 68) | 6 (1; 29) | ||||
Quartiles of total energy intake (kcal) | < 1875 | 16,882 (25) | 42 (15; 95) | < 0.05 | 4 (0; 45) | < 0.05 | 3 (0; 20) | < 0.05 |
1875–2222 | 16,883 (25) | 53 (21; 112) | 7 (0; 64) | 5 (1; 28) | ||||
2223–2651 | 16,927 (25) | 60 (25; 125) | 8 (0; 72) | 6 (1; 31) | ||||
> 2651 | 16,877 (25) | 78 (32; 158) | 10 (0; 89) | 6 (1; 34) | ||||
BMI | < 18.5 | 2046 (3) | 56 (22; 114) | < 0.05 | 7 (0; 64) | < 0.05 | 6 (1; 28) | < 0.05 |
18.5 to 24.9 | 43,713 (65) | 59 (23; 122) | 8 (0; 74) | 6 (1; 28) | ||||
25 to 29.9 | 15,206 (22) | 59 (23; 126) | 6 (0; 66) | 6 (1; 28) | ||||
30 to 34.9 | 4647 (7) | 56 (21; 124) | 3 (0; 48) | 3 (0; 17) | ||||
35 to 39.9 | 1358 (2) | 51 (20; 114) | 2 (0; 36) | 3 (0; 17) | ||||
> 40 | 406 (1) | 60 (21; 128) | 0 (0, 27) | 3 (0; 17) | ||||
Missing | 193 | 70 (25; 137) | 6 (0; 62) | 6 (0; 40) |