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Table 3 Distribution of the participants’ opinions on the time, duration, method and seasonal differences of recommending vitamin D supplement

From: How should we give vitamin D supplementation? evaluation of the pediatricians’ knowledge in Turkey

   Pediatric resident Pediatrician p
n (%)
When do you recommend to start vitamin D supplement? At birth 24 (21.8) 26 (24.3) 0.186
On the 15th day after birth 75 (68.2) 77 (72.0)
In a month after birth 5 (4.5) 4 (3.7)
When the infant is 3-month-old 5 (4.5) 0 (0.0)
Other 1 (0.9) 0 (0.0)
For how long do you recommend vitamin D supplement? Until the closure of fontanelle 20 (18.2) 1 (0.9) 0.001
Until the 6th month of life 2 (1.8) 1 (0.9)
Until the age of 1 year 45 (40.9) 52 (48.6)
Until the age of 2 years 36 (32.7) 44 (41.1)
Until the age of 3 years and longer 7 (6.4) 9 (8.4)
At what dose do you recommend vitamin D supplement? Daily 200 IU 2 (1.8) 0 (0.0) 0.336
Daily 400 IU 99 (90) 95 (88.8)
Daily 600 IU 6 (5.5) 8 (7.5)
Breaking an ampoule and receiving orally 1 (0.9) 0 (0.0)
No comment 2 (1.8) 4 (3.7)
Do you recommend different dose of vitamin D depending on the season (summer-winter)? Only in winter 7 (6.4) 0 (0.0) 0.012
Entire year, higher in winter 45 (40.9) 37 (34.6)
Entire year at the same dose 58 (52.7) 70 (65.4)
Method of vitamin D supplement? Drop 92 (83.6) 90 (84.1) 0.521
Drop + multivitamin 10 (9.1) 12 (11.2)
Drop + ampoul 2 (1.8) 0 (0.0)
Multivitamin 6 (5.5) 5 (4.7)